Mozilla
Monthly
Mitigation bypass in Mozilla Firefox's DOM Notifications component allows remote attackers to defeat browser-enforced protections governing web notifications; it is fixed in Firefox 156 and Firefox ESR 153.3, so any earlier Firefox build or ESR build before 153.3 remains affected. Exploitation is remote and unauthenticated (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L, 6.3) but requires the victim to visit or interact with attacker-controlled web content, and impact is limited to low confidentiality, integrity, and availability effects within the browser process. No public exploit code is identified at time of analysis, EPSS places likelihood at roughly 0.16% (6th percentile), and CISA KEV does not list this issue, so real-world priority is low-to-moderate.
An information-disclosure weakness in the Graphics: ImageLib component of Mozilla Firefox allows remote attackers to expose sensitive data when a victim loads attacker-controlled image content; because the CVSS vector carries PR:N with UI:R, no authentication or privileges are needed but the victim must open the crafted content. Impact is limited to confidentiality loss (C:H with I:N/A:N), so it is a moderate-severity flaw rather than a code-execution or availability risk. Mozilla fixed it in Firefox 156, Firefox ESR 140.16, and Firefox ESR 153.3, and EPSS is low at 0.16% (5th percentile) with no public exploit identified at time of analysis and no CISA KEV listing.
A protection-mechanism bypass in Firefox's DOM Copy & Paste and Drag & Drop component lets attacker-controlled web content escape an intended security mitigation (CWE-693), yielding limited confidentiality and integrity impact. All Firefox builds prior to 156, Firefox ESR prior to 140.16, and Firefox ESR prior to 153.3 are affected. Exploitation is unauthenticated (PR:N) but requires the victim to visit attacker-controlled content and then perform a copy-paste or drag-and-drop action (UI:R); there is no public exploit identified at time of analysis and EPSS is a low 0.16% (6th percentile). This is a moderate, low-priority browser bug, not a remote-code-execution issue.
Use-after-free in Mozilla Firefox's Audio/Video: Web Codecs component allows a remote attacker to crash the browser's content process by getting a victim to load crafted media that is decoded or encoded through the WebCodecs API. The issue affects Firefox builds prior to 156 and the ESR branches prior to 140.16 (ESR 140) and 153.3 (ESR 153), and has been fixed by Mozilla in those releases. Impact is confined to availability - the memory-safety bug is not assessed as enabling code execution or data theft - and every quantitative signal points to low real-world priority: EPSS is just 0.16% (5th percentile), there is no CISA KEV listing, and no public exploit code has been identified at time of analysis. Note that NVD publishes this as AV:N/AC:L/PR:N/UI:N, while our assessment reclassifies it as UI:R because exploitation realistically requires the victim to render attacker-controlled media.
Repeated external URL scheme invocations from a malicious webpage can flood Firefox for iOS with system confirmation prompts or trigger cascading external application launches, rendering the browser temporarily unusable. All Firefox for iOS versions prior to 155.1 on Apple iOS devices are affected. No active exploitation has been identified; Mozilla released the fix in Firefox for iOS 155.1, and exploitation requires the user to visit the attacker-controlled page.
Clickjacking in Firefox's DOM Events component allows an unauthenticated remote attacker to redirect a victim's browser interactions from an overlaid or framed context, resulting in limited confidentiality and integrity impact across an origin boundary. All Firefox versions prior to 155 and Firefox ESR versions prior to 153.2 are affected, per multiple Mozilla security advisories (mfsa2026-82, mfsa2026-85, mfsa2026-86, mfsa2026-88). No public exploit has been identified at time of analysis, and the EPSS score of 0.14% (4th percentile) reflects very low observed exploitation probability.
Uncontrolled resource consumption in Mozilla Firefox's built-in PDF Viewer component allows a remote, unauthenticated attacker to crash or hang the browser by inducing a victim to open a specially crafted PDF file. All Firefox releases prior to version 155 are affected, as confirmed by Mozilla Security Advisories MFSA2026-82 and MFSA2026-86. No public exploit code or CISA KEV listing has been identified, and EPSS at 0.14% (4th percentile) reflects very low real-world exploitation probability.
Spoofing via origin validation failure in Firefox's DOM Core & HTML component allows a remote unauthenticated attacker to misrepresent content origin within the browser, achieving low-integrity impact against users of all Firefox versions before 155 and Firefox ESR before 153.2. The vulnerability class (CWE-346, Origin Validation Error) indicates the browser fails to correctly enforce the origin of DOM operations or HTML content, enabling cross-origin content spoofing. Multiple Mozilla Security Advisories (mfsa2026-82, -85, -86, -88) confirm the fix; EPSS of 0.14% (4th percentile) and absence from CISA KEV indicate no active exploitation at this time.
Cross-site scripting in Firefox's DOM Navigation component allows a remote unauthenticated attacker to inject and execute script content across security origins when a victim visits a specially crafted webpage. The vulnerability is classified CWE-79 with scope change (S:C), indicating potential cross-origin impact beyond the attacked page. Mozilla patched this in Firefox 155 and Firefox ESR 153.2, with coverage across multiple advisory tracks (mfsa2026-82, -85, -86, -88). No public exploit code or active exploitation has been identified at time of analysis.
Information disclosure in Firefox for Android's WebExtensions component exposes sensitive browser or cross-origin data to remote attackers who can induce user interaction. Affecting all Firefox for Android versions prior to 155, the flaw is accessible over the network with low complexity but requires a user to interact with attacker-controlled content, gating mass exploitation. No public exploit identified at time of analysis, and the vulnerability is not listed in CISA KEV.
Incorrect boundary conditions in Firefox's CSS Grid layout engine expose limited browser process memory to remote attackers who deliver crafted web content. All Firefox versions prior to 155 are affected; exploitation requires a victim to visit or render attacker-controlled content, producing low-level confidentiality disclosure with no integrity or availability impact. Mozilla issued the fix in Firefox 155 via MFSA2026-82; no public exploit code and no CISA KEV listing have been identified at time of analysis.
Use-after-free in Firefox's DOM Core & HTML component allows network-reachable attackers to achieve limited memory disclosure and DOM integrity impact against users running Firefox below version 155 or Firefox ESR below 153.2. Exploitation requires user interaction - a victim must visit or be redirected to attacker-controlled content - but no authentication or elevated privileges are needed. No public exploit code or active exploitation (CISA KEV) has been identified at time of analysis; Mozilla has released patched versions addressing the flaw.
Use-after-free memory corruption in Firefox's DOM Core and HTML component allows a remote attacker to achieve limited confidentiality and integrity impact against users running unpatched Firefox versions by directing them to a crafted webpage. All Firefox releases prior to version 155, ESR 140.15, and ESR 153.2 are affected; Mozilla has shipped fixes across all three release channels. No public exploit code or active exploitation has been identified at time of analysis.
Use-after-free in Firefox's Audio/Video media pipeline allows unauthenticated remote attackers - requiring only user interaction - to read or modify limited browser memory content. Affected releases span Firefox stable prior to 155 and both ESR tracks prior to 140.15 and 153.2, covered by three separate Mozilla security advisories (MFSA2026-82, MFSA2026-84, MFSA2026-85). No public exploit code exists at time of analysis and SSVC exploitation status is 'none,' though the CWE-416 class carries inherent escalation risk beyond the partial impact Mozilla scored.
Use-after-free in Firefox's JavaScript garbage collector (GC) component exposes users to partial memory disclosure and corruption when visiting attacker-controlled web pages. Both the standard release line (Firefox 155) and the extended support release (Firefox ESR 153.2) are patched. No public exploit or active exploitation is confirmed; SSVC exploitation status is none and the vulnerability is absent from CISA KEV.
Use-after-free in Firefox's Audio/Video component exposes users running Firefox prior to version 155 and affected ESR branches to potential heap memory disclosure and limited data modification when processing attacker-controlled media. The vulnerability is network-reachable but requires user interaction - visiting a malicious or compromised page that triggers media playback - and carries a CVSS score of 5.4 reflecting bounded C:L/I:L impact with no availability loss. No public exploit code or active exploitation has been identified at time of analysis; SSVC assessment classifies exploitation status as none and the vulnerability as non-automatable.
Address bar spoofing in Firefox for iOS lets a malicious webpage stall a popup's cross-origin navigation after the browser internally commits it, causing the address bar to display the intended destination's origin while the popup continues rendering attacker-controlled content. All Firefox for iOS releases prior to 155.0 are affected; the fix shipped in version 155.0 per Mozilla advisory MFSA2026-81. No public exploit has been identified and CISA SSVC confirms exploitation status as none, but the phishing potential is realistic given the deceptive UI state.
Stored XSS in PrivateBin versions up to 2.0.4 allows an anonymous attacker to attach a text/html file to a paste such that, when a victim opens the download link in a new tab, the attacker's inline JavaScript executes in the PrivateBin instance's web origin with full same-origin capability including localStorage access and same-origin fetch. This is an incomplete fix for CVE-2022-24833: the 2022 patch only sanitized the preview blob for SVG files but never updated the download link's blob, leaving all non-SVG active content types-including text/html-completely bypassing DOMPurify. A detailed proof-of-concept demonstrating exploitation with Playwright/Chromium automation is publicly available in GitHub Security Advisory GHSA-f2xf-7x3g-4272; no public exploit identified as confirmed actively exploited per CISA KEV.
Froxlor's standalone AJAX endpoint (lib/ajax.php) entirely bypasses the CSRF token enforcement present in lib/init.php, allowing a remote attacker to forge state-changing POST requests on behalf of any authenticated administrator who visits a malicious page. Successful exploitation modifies administrator API key properties - specifically injecting the attacker's IP into the allowed_from whitelist and setting valid_until to -1 (never expires) - creating a persistent foothold for future API abuse if the API secret is later obtained. A working proof-of-concept HTML page is included in the public GitHub security advisory (GHSA-xpr4-8vp6-c87j); no CISA KEV listing found at time of analysis. EPSS data was not provided, but the UI:R requirement and niche product footprint constrain real-world exploitation.
Race condition in Firefox's JavaScript Engine (CVE-2026-74984) exposes users on all Firefox versions prior to 154 and ESR versions prior to 153.1 to potential confidentiality and integrity compromise. The CWE-362 flaw creates a timing window during concurrent JavaScript execution in which an attacker-controlled script can race against the engine's internal state management, enabling memory read or write access. No public exploit code has been identified and EPSS sits at the 5th percentile, indicating no widespread exploitation at time of analysis.
Clickjacking in Firefox for Android's Downloads component enables remote attackers to trick users into performing unintended download-related actions through UI redress. All Firefox for Android versions prior to 154 are affected, with the fix confirmed in Mozilla Security Advisory mfsa2026-74. No public exploit has been identified at time of analysis, and the EPSS score of 0.14% (4th percentile) reflects very low observed exploitation probability.
UI spoofing in the Downloads component of Firefox for Android allows network-accessible attackers to misrepresent critical information to users, potentially deceiving them about the nature or origin of downloaded content. Affected versions are those prior to Firefox 154 on Android, as confirmed by Mozilla's security advisory MFSA2026-74. No public exploit code exists and CISA has not added this to the KEV catalog; SSVC signals exploitation status as none with partial technical impact.
Site isolation bypass in Firefox's Graphics component allows a remote attacker who can induce user interaction to read cross-origin data or tamper with content across site boundaries. Affected versions are all Firefox releases prior to 154 and all Firefox ESR releases prior to 153.1. No public exploit has been identified and CISA SSVC rates exploitation as none at time of analysis, but the network-accessible attack surface and broad deployment footprint make this a meaningful patching priority.
Site isolation bypass in Firefox's Graphics: WebRender component allows a remote attacker to achieve limited cross-origin information disclosure and content manipulation by delivering a crafted webpage to a user (CWE-346, origin validation error). All Firefox releases prior to 154 and Firefox ESR releases prior to 153.1 are affected across all platforms. No public exploit code or active exploitation has been identified at time of analysis, and the vulnerability is not listed in the CISA KEV catalog.
Clickjacking in Firefox for Android before version 154 allows remote unauthenticated attackers to overlay transparent or opaque UI frames over legitimate browser content, capturing user interactions intended for other elements. The CVSS vector (PR:N, UI:R, I:H) indicates no privileges are needed but a victim must interact with an attacker-controlled page, resulting in high-integrity impact through unintended user actions such as inadvertent permission grants or form submissions. No public exploit identified at time of analysis, and this vulnerability is not listed in the CISA KEV catalog.
JIT miscompilation in Firefox's SpiderMonkey JavaScript engine exposes sensitive memory to remote attackers via crafted web content. The CWE-843 (type confusion) root cause means the JIT compiler generates native code that accesses a JavaScript value as the wrong type, resulting in a high-confidentiality information disclosure. Vendor-released patches are available in Firefox 154, Firefox ESR 140.14, and Firefox ESR 153.1; no public exploit or CISA KEV listing has been identified at time of analysis.
Same-origin policy bypass in Firefox's ImageLib image rendering component allows remote attackers to read cross-origin data or perform unauthorized cross-origin writes against victims using unpatched browser versions. Affected releases span the main Firefox channel (prior to 154) and three ESR branches (prior to ESR 115.39, ESR 140.14, and ESR 153.1), placing a large share of the global Firefox install base at risk until patched. The CVSS 5.4 score reflects limited confidentiality and integrity impact with no authentication requirement on the attacker side, though no public exploit has been identified and this CVE is not listed in the CISA KEV catalog at the time of analysis.
Race condition and use-after-free memory corruption in Mozilla Firefox's Graphics component allows remote unauthenticated attackers to achieve limited confidentiality and integrity impact when a user visits a malicious web page. Affected across the standard release channel and all ESR branches, the vulnerability is fixed in Firefox 154, ESR 115.39, ESR 140.14, and ESR 153.1 per Mozilla's official advisories. No public exploit code has been identified and CISA has not listed this in KEV; the SSVC framework rates exploitation status as none and marks it not automatable.
Information disclosure through Firefox's DOM Push Subscriptions component exposes limited confidential data to network-positioned attackers who can induce user interaction. All Firefox releases prior to 154 and both Firefox ESR branches (pre-140.14 and pre-153.1) are affected, with Mozilla issuing at least six security advisories (mfsa2026-74 through mfsa2026-80) addressing this and related issues. No public exploit code or CISA KEV listing has been identified at time of analysis, and the CVSS 4.3 Medium rating reflects the limited scope of data exposed and the mandatory user-interaction requirement.
Information disclosure in Firefox's DOM UI Events and Focus Handling component exposes limited sensitive data to remote attackers when a victim visits a crafted web page. All Firefox releases prior to 154, ESR prior to 140.14, and ESR 153.x prior to 153.1 are affected across all platforms, as confirmed by Mozilla across six simultaneous security advisories (mfsa2026-74 through mfsa2026-80). No active exploitation has been confirmed (not in CISA KEV) and no public exploit code has been identified; real-world risk is moderated by the required user interaction and limited confidentiality-only impact.
Same-origin policy bypass in Firefox's Audio/Video Playback component exposes users to cross-origin data reads and limited content manipulation when visiting a malicious webpage. All Firefox stable releases prior to 154 and both ESR tracks prior to 140.14 and 153.1 are affected, with Mozilla issuing a coordinated advisory series (mfsa2026-74 through mfsa2026-80) covering the full release matrix. No public exploit code or CISA KEV listing has been identified at time of analysis; exploitation requires user interaction but no credentials or special configuration.
Same-origin policy bypass in Firefox's Networking: Cookies component exposes users to cross-origin cookie theft and manipulation when visiting attacker-controlled pages. All Firefox versions prior to 154 and both ESR branches prior to ESR 140.14 and ESR 153.1 are affected, with Mozilla publishing at least six separate security advisories (mfsa2026-74 through mfsa2026-80) indicating broad coverage across release tracks. No public exploit code or active exploitation via CISA KEV has been identified at time of analysis; the CVSS 5.4 Medium score reflects real but bounded confidentiality and integrity risk, gated by a mandatory user-interaction requirement.
Information disclosure in Firefox's Graphics component exposes sensitive data to remote attackers who can lure users to a malicious webpage. All Firefox release channels prior to version 154 and multiple ESR branches are affected, with fixes shipping in Firefox 154, ESR 115.39, ESR 140.14, and ESR 153.1. No public exploit code has been identified and exploitation probability is very low (EPSS 0.16%), though the high confidentiality impact and zero-privilege-required attack path make patching a straightforward priority.
Information disclosure in Firefox's Graphics: Text rendering component allows a remote unauthenticated attacker to leak sensitive memory contents when a user visits or interacts with crafted content. All Firefox release channels are affected, spanning the main release (pre-154) and three ESR branches (pre-115.39, pre-140.14, pre-153.1). No public exploit code exists and EPSS exploitation probability sits at just 0.20% (10th percentile), suggesting low real-world exploitation activity despite the high confidentiality impact scored by CVSS.
Predictable temporary file paths in Etherpad's import and export handlers expose multi-tenant deployments to a symlink-based file overwrite attack. All ep_etherpad-lite versions through v3.0.0 are affected; exploitation requires local host access, an unprivileged OS account, and - for high-impact scenarios - the Etherpad process running as root, a common default in many Docker base images. A proof-of-concept sketch is included in the vendor advisory GHSA-2jwf-f4xq-f24h; no public weaponized exploit code beyond that sketch exists and this vulnerability is not listed in the CISA KEV catalog.
Information disclosure in Firefox for Android and Firefox Focus for Android exposes sensitive user data to network-based attackers who can lure a victim into interacting with a crafted web resource. The vulnerability, tracked under CWE-200 and assigned a CVSS score of 6.5 with high confidentiality impact, is limited to Android platform builds and does not affect desktop Firefox. Mozilla patched this in Firefox 153.0.3 per advisory mfsa2026-73; no public exploit or active exploitation has been identified at time of analysis.
Uncontrolled resource consumption in dompdf's BMP image processing pipeline allows any unauthenticated attacker who can submit HTML to a dompdf-powered endpoint to exhaust server memory and stall PHP-FPM worker pools with a 169-byte HTTP request. The library trusts attacker-controlled BMP header dimensions without bounding width × height, causing PHP's GD extension to allocate a full native pixel canvas - bypassing PHP's memory_limit entirely because GD allocates through its own native allocator. A publicly available, verified proof-of-concept demonstrates ~12× memory amplification (34 MB control vs ~412 MB attack peak RSS) from identically-sized requests, making this a high-impact, low-effort denial-of-service primitive. No active exploitation confirmed in CISA KEV at time of analysis.
Public-only personal access token scope enforcement in Gitea's REST API is inconsistently applied across two organization endpoints, allowing a token holder to enumerate private organization memberships and retrieve detailed permission data (ownership, admin status, write access, repository-creation capability) that the public-only restriction was explicitly designed to block. All Gitea versions prior to 1.27.0 are affected via GET /api/v1/user/orgs and GET /api/v1/users/{username}/orgs/{org}/permissions. Publicly available exploit code with full HTTP request/response traces is confirmed in the GHSA advisory; no CISA KEV listing exists, indicating no confirmed opportunistic mass exploitation at time of analysis.
Draft release attachment disclosure in Gitea exposes files uploaded to draft releases to unauthenticated network callers via UUID-based web endpoints, bypassing access controls that correctly gate the parallel API handlers. This is an incomplete fix for CVE-2026-27660: that advisory's PR #36659 added `canAccessReleaseDraft` checks to every API code path but left the web-side `ServeAttachment` handler ungated, allowing anyone who obtains an attachment UUID to download its contents with no authentication. A working proof-of-concept is documented in the advisory and confirmed against Gitea v1.27.0+dev; no public exploit identified at time of analysis beyond the advisory PoC, and the vulnerability does not appear in CISA KEV.
Address bar spoofing in Mozilla Firefox (all versions prior to 153) enables a remote, unauthenticated attacker to misrepresent the displayed origin in the browser's address bar, the primary trust signal users rely on to validate site authenticity. The CVSS vector (AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N) confirms exploitation is low-complexity and requires only a single user interaction - navigating to a crafted page - with no authentication or special privileges needed from the attacker. No public exploit has been identified and EPSS sits at 0.13% (3rd percentile), indicating limited exploitation activity; however, the integrity of user trust decisions is fully undermined when the flaw is triggered, making it an effective phishing enabler.
Clickjacking (UI redressing) in the WebExtensions component of Firefox for Android allows a network-based attacker to hijack user interactions, resulting in high-integrity impact against the victim's browser session. All Firefox for Android versions prior to 153 are affected; Mozilla has released a fix in Firefox 153. No public exploit code has been identified and this vulnerability is not listed in the CISA KEV catalog at time of analysis.
Drive-by local filesystem exfiltration in FiftyOne versions below 1.17.0 allows any malicious website to silently read arbitrary files from a victim's machine. The FiftyOne App server unconditionally returns Access-Control-Allow-Origin: * on all responses, and the unauthenticated /media endpoint serves local filesystem files by path - together these let JavaScript on any visited webpage fetch files such as SSH keys, cloud credentials, or .env files from localhost:5151 and relay them to an attacker-controlled server. No public exploit (KEV or confirmed POC) is identified at time of analysis, but the attack requires no special tooling and is trivially reproducible in Safari and Firefox, which lack Private Network Access protections.
Fullscreen mode in Zen Browser desktop prior to 1.19.13b exposes users to credential-theft phishing by failing to display a persistent, visible security notification when a webpage enters fullscreen. An attacker-controlled page can completely occlude the real browser chrome - including the address bar and origin indicators - then render a convincing imitation of a trusted site's login interface. When combined with long-domain URL eliding, this allows precise origin spoofing; no public exploit has been identified at time of analysis, and the CVSS 4.0 score of 6.3 reflects high subsequent-system integrity and confidentiality impacts despite the attack requiring user interaction.
Firefox versions prior to 152.0.6 are exposed to a network-exploitable flaw requiring user interaction that yields limited confidentiality and integrity impact within the browser context. Publicly available exploit code exists, confirmed by Mozilla's own advisory language, though the vendor reports no known attacks in the wild at time of disclosure. The fix is confirmed in Firefox 152.0.6, referenced in Mozilla security advisory MFSA2026-67.
Information disclosure in Mozilla Firefox via CWE-763 (Release of Invalid Pointer or Reference) allows network-based attackers to read limited memory contents from affected browser instances. All Firefox versions prior to 152.0.6 are affected. Publicly available exploit code exists, though Mozilla reports no confirmed attacks in the wild; user interaction is required to trigger the flaw, moderately reducing real-world exposure.
PDF save functionality in Firefox for iOS allows maliciously crafted page titles to manipulate the output file path, enabling overwrites of existing PDF files or bundled application content within the Firefox iOS sandbox. All versions prior to 152.4 on Apple iOS devices are affected. An attacker operating a malicious website can lure a user into saving a page as PDF, causing the crafted title to resolve to an unintended file path within the app sandbox - potentially corrupting application state or stored documents. No public exploit has been identified at time of analysis, though SSVC classifies the vulnerability as automatable with partial technical impact.
Open redirect bypass in openrun prior to v0.17.7 allows remote unauthenticated attackers to redirect victims to arbitrary external URLs by exploiting a double-slash path prefix that evades the application's host/scheme validation. The referrer-based redirect logic correctly validates the host and scheme but passes the extracted path `//attacker.com` to the Location header, which browsers interpret as a protocol-relative URL and resolve to an external destination. A proof-of-concept is publicly documented in the security advisory; no active exploitation has been confirmed by CISA KEV at time of analysis.
System principal privilege escalation in Zen Browser prior to 1.21.5b allows a malicious webpage to bypass Firefox's content-to-file security boundary by exploiting the browser's custom glance and split-view context-menu features. The 'Open link in glance' and 'Split link in new tab' actions navigate attacker-supplied file:// URLs using the System principal rather than the originating page's content principal, granting access to local filesystem contents that would be blocked by an ordinary click. A vendor-released patch exists in version 1.21.5b; no public exploit has been identified at time of analysis.
Address bar spoofing in Firefox for iOS allows a remote unauthenticated attacker to display a trusted origin in the browser's address bar while the victim views and interacts with fully attacker-controlled content - a classic and effective phishing enabler. The attack exploits a race condition in navigation handling: a malicious page enqueues a synchronous JavaScript dialog at the moment a user navigates away, freezing the address bar on the destination's legitimate origin while the malicious page's content continues to render. No public exploit code has been identified and EPSS is 0.15% (4th percentile), indicating no observed widespread exploitation; however, the technique is conceptually simple and phishing value is high.
HTML injection via Matrix and XMPP chat in Mozilla Thunderbird allows remote network-accessible attackers to inject arbitrary styled content, phishing links, and CSS that manipulates the chat UI without any authentication. All Thunderbird versions prior to 152.0.1 and 140.12.1 ESR are affected. No public exploit has been identified and EPSS sits at 0.14% (4th percentile), but SSVC flags the attack as automatable with partial technical impact, making it a realistic phishing and UI-deception vehicle for anyone reachable via federated Matrix or XMPP.
Memory exhaustion denial-of-service in Mozilla Thunderbird's LDAP address-book autocomplete client allows a malicious or compromised LDAP server to crash the application by returning unbounded data payloads. Affected users are those explicitly configured to query an LDAP directory server for autocomplete, making this a targeted rather than opportunistic attack. No public exploit has been identified at time of analysis, and EPSS at 0.14% (4th percentile) alongside a CISA SSVC exploitation rating of 'none' confirms very low real-world urgency.
Open redirect bypass in Miniflux v2 (versions <= 2.3.0) enables unauthenticated remote attackers to redirect victims to arbitrary external URLs by exploiting a backslash normalization discrepancy between server-side URL validation and browser behavior. The self-hosted RSS reader's login handler accepts a redirect_url parameter validated by an IsRelativePath function that blocks // prefixes but permits /\attacker.com - a string that all major browsers (Chrome, Firefox, Safari, Edge, as indicated by advisory tags) silently normalize to //attacker.com during HTTP Location header processing. A publicly documented proof-of-concept is available via GHSA-m999-j542-5w3r; no active exploitation has been confirmed in CISA KEV at time of analysis.
Cookie injection in Firefox for iOS (all versions prior to 152.0) arises from the browser's TemporaryDocument PDF handling mechanism incorrectly preserving cookies from an initial PDF request across cross-origin HTTP redirects. This violates same-origin cookie isolation, enabling a malicious site to inject arbitrary cookies into requests directed at an unrelated target domain and potentially manipulate session or authentication state on that domain. No public exploit code has been identified and no CISA KEV listing exists; the CVSS vector (AV:N/AC:L/PR:N/UI:R) indicates low-complexity remote exploitability contingent on user interaction, and Mozilla has shipped a vendor-released patch in Firefox for iOS 152.0.
Cookie leakage in Firefox for iOS prior to 152.0 allows an attacker-controlled suffix domain to intercept cookies intended for a target site during PDF request handling. The browser's PDF loading code path applied partial rather than exact-origin domain matching when deciding which cookies to attach, meaning a domain such as 'evilbank.com' could satisfy a suffix match against 'bank.com' and receive that site's cookies. No active exploitation is confirmed, but the SSVC framework rates this as automatable with partial technical impact, making it a credible session-hijacking vector for users on unpatched versions.
Incorrect boundary conditions in Mozilla Firefox's Internationalization component allow a network-accessible attacker to cause limited memory corruption, resulting in partial confidentiality and integrity compromise. Affected versions include all Firefox ESR releases prior to 140.12 and 115.37; vendor-released patches are available in both ESR branches. No public exploit has been identified at time of analysis, CISA has not added this to its Known Exploited Vulnerabilities catalog, and EPSS scores exploitation probability at a very low 0.16% (6th percentile), suggesting limited real-world attacker interest.
Memory safety vulnerability (CWE-119 buffer overflow class) in Mozilla Firefox ESR prior to version 140.12 enables remote unauthenticated attackers to cause a partial denial of service by triggering a browser crash. The CVSS vector confirms network delivery with no privileges or user interaction required per vendor scoring, and impact is limited strictly to availability (A:L) with no confidentiality or integrity consequences. No public exploit code has been identified at time of analysis, and EPSS at 0.25% (16th percentile) places this well below typical exploitation thresholds despite its automatable delivery vector.
Uncontrolled resource consumption in Mozilla Firefox's Graphics: ImageLib component allows remote attackers to crash or hang the browser by serving specially crafted image content to an unsuspecting user. All Firefox release-channel versions prior to 152 and both ESR tracks (prior to 140.12 and 115.37) are affected, exposing a broad install base across consumer and enterprise environments. No public exploit has been identified, SSVC rates exploitation as none with a non-automatable attack path, and KEV listing is absent - signals that collectively place this vulnerability at lower real-world priority despite a CVSS 6.5 score.
Spoofing via CWE-1021 (UI layer restriction failure) in Mozilla Firefox's DOM Core & HTML component allows remote unauthenticated attackers to render deceptive UI content in a victim's browser when they interact with a malicious web page. All Firefox versions prior to 152 are affected. No public exploit has been identified at time of analysis, and CISA SSVC assessment classifies exploitation status as none with partial technical impact, placing real-world urgency below the moderate CVSS score suggests.
Clickjacking via the Widget: Gtk component in Mozilla Firefox allows a remote, unauthenticated attacker to deceive users on Linux desktop systems into unintended interactions with improperly restricted GTK-rendered browser UI layers. All Firefox versions prior to 152 on GTK-based Linux platforms are affected, with fixes confirmed in Mozilla Foundation Security Advisories MFSA2026-57 and MFSA2026-60. No public exploit is identified at time of analysis; SSVC rates exploitation as 'none' and EPSS sits at 0.17% (6th percentile), indicating negligible active exploitation pressure despite the network-accessible attack vector.
JIT miscompilation in Mozilla Firefox's WebAssembly component (all versions prior to Firefox 152) exposes users to partial confidentiality and integrity compromise when visiting attacker-controlled web content. The flaw stems from incorrect control flow implementation (CWE-670) in the JIT compiler when processing crafted WebAssembly bytecode, resulting in erroneous native code generation that can allow limited memory reads or unintended writes. No active exploitation is confirmed - the vulnerability is absent from CISA KEV, EPSS is at the 5th percentile (0.16%), and SSVC marks exploitation as 'none' - placing this firmly in routine patch priority despite its network-accessible attack vector. Mozilla has released a fix in Firefox 152 via advisories MFSA2026-57 and MFSA2026-60.
Information disclosure in Firefox's Password Manager component allows a network-based attacker to partially expose sensitive credential data by inducing a user to interact with attacker-controlled content, affecting all Firefox versions prior to 152. The CVSS vector (AV:N/PR:N/UI:R/C:L) confirms no attacker authentication is required, but user interaction is mandatory, limiting automated exploitation. EPSS at 0.18% (8th percentile) and SSVC exploitation status of 'none' indicate negligible real-world exploitation pressure at time of analysis; no public exploit code has been identified.
Denial-of-service in Mozilla Firefox's Audio/Video Playback component allows a remote attacker to crash or render the browser unresponsive by delivering crafted media content to a victim. All Firefox releases prior to version 152 are affected per CPE coverage. No public exploit has been identified at time of analysis, and SSVC rates exploitation as none with partial technical impact, placing this in the moderate-priority tier rather than an emergency response category.
Sandbox escape with information disclosure in Mozilla Firefox's Process Sandboxing component allows a remote attacker to break out of the browser sandbox and read sensitive data from the host environment when a user visits attacker-controlled content. Affected versions span all Firefox releases prior to 152 and all Firefox ESR releases prior to 140.12, patched by Mozilla in mfsa2026-57 and mfsa2026-58. No public exploit identified at time of analysis and SSVC signals no current exploitation activity, keeping real-world urgency at moderate priority despite the scope-changing nature of the flaw.
Firefox's Process Sandboxing component allows information disclosure and partial sandbox escape when a user visits a specially crafted webpage, affecting all Firefox versions prior to 152 and Firefox ESR prior to 140.12. The CVSS Scope:Changed metric confirms the flaw crosses the sandbox boundary, while impact is constrained to low confidentiality disclosure with no integrity or availability consequence. No public exploit code exists and SSVC confirms no known exploitation; EPSS at 0.18% (8th percentile) reinforces this is a lower-priority real-world threat despite the sandbox-crossing nature of the bug.
Memory safety violation (CWE-119) in Mozilla Firefox allows remote attackers without authentication or elevated privileges to achieve limited confidentiality breach and availability disruption against unpatched browser instances. Affected versions include all Firefox releases prior to 152 and all Firefox ESR releases prior to 140.12, with patches confirmed released by Mozilla across advisories mfsa2026-57, mfsa2026-58, mfsa2026-60, and mfsa2026-61. No public exploit code has been identified and the vulnerability is absent from the CISA KEV catalog; EPSS probability sits at 0.25% (16th percentile), consistent with SSVC exploitation status of 'none' - suggesting low current threat actor interest despite an automatable attack surface.
Memory safety vulnerability (CWE-119) in Mozilla Firefox prior to version 152 and Firefox ESR prior to 140.12 allows remote unauthenticated attackers to achieve partial information disclosure via a crafted web interaction that triggers an out-of-bounds memory operation. The CVSS vector (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N) reflects network reachability without credentials, though impact is confined to limited confidentiality loss with no integrity or availability consequences. No public exploit code has been identified, EPSS stands at 0.28% (19th percentile), and CISA has not listed this in the Known Exploited Vulnerabilities catalog - signals that consistently point to low near-term exploitation risk.
Memory safety buffer-handling flaw in Mozilla Firefox before version 152 and Firefox ESR before 140.12 enables remote unauthenticated attackers to achieve partial confidentiality impact - likely through memory content disclosure - via a network-accessible attack path requiring no user privileges. No public exploit code has been identified at time of analysis, and CISA has not listed this in the Known Exploited Vulnerabilities catalog. EPSS probability stands at 0.28% (19th percentile), consistent with SSVC's 'exploitation: none' classification, indicating low near-term exploitation likelihood despite the automatable attack path.
Memory safety bug (CWE-119, buffer bounds violation) in Mozilla Firefox prior to version 152 exposes limited memory contents to remote attackers without requiring authentication or user interaction per the supplied CVSS vector. Affected across all Firefox versions before 152 and ESR versions before 140.12, with multiple Mozilla security advisories (mfsa2026-57, mfsa2026-58, mfsa2026-60, mfsa2026-61) issued simultaneously, suggesting a coordinated release addressing this class of flaw. No active exploitation is confirmed (not in CISA KEV), and EPSS is very low at 0.28% (19th percentile), though SSVC flags the attack as automatable with partial technical impact.
Out-of-bounds read in Firefox's WebGPU graphics component exposes browser memory contents to remote attackers who can lure a user to a malicious webpage. All Firefox versions prior to 152 are affected, with the vulnerability stemming from incorrect boundary conditions during GPU-accelerated rendering operations. No public exploit or active exploitation has been identified at time of analysis; exploitation requires user interaction, limiting opportunistic mass exploitation despite the zero-authentication requirement on the attacker side.
Protection mechanism failure in Mozilla Firefox's DOM Security component permits remote unauthenticated attackers to bypass browser security mitigations, resulting in partial confidentiality and integrity compromise. All Firefox versions prior to 152, Firefox ESR prior to 140.12, and Firefox ESR 115.x prior to 115.37 are affected across major Linux distributions including Red Hat and SUSE. No active exploitation is confirmed (absent from CISA KEV, EPSS at 0.28%), though SSVC classifies the vulnerability as automatable, meaning mass-scale delivery via malvertising or phishing infrastructure is technically feasible if weaponized.
Memory safety bug (CWE-119, buffer overflow class) in Mozilla Firefox prior to version 152 exposes a limited portion of browser memory to remote attackers via network-delivered content. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N) reflects a network-exploitable, unauthenticated path with partial confidentiality impact only - no integrity or availability consequences are indicated. No public exploit has been identified at time of analysis, EPSS is low at 0.27% (18th percentile), and CISA SSVC confirms no observed exploitation, placing this in the moderate-priority tier despite its wide network attack surface.
Memory safety buffer overflow in Mozilla Firefox (all versions prior to 152) allows remote unauthenticated attackers to read partial process memory contents via network-accessible browser processing paths. The CVSS vector (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N) confirms no privileges or user interaction beyond normal browser activity are required, though impact is bounded to low confidentiality disclosure with no integrity or availability consequence. No public exploit has been identified at time of analysis, EPSS stands at 0.27% (18th percentile), and SSVC confirms zero observed exploitation - placing this in the patch-in-normal-cycle category rather than emergency response.
JIT miscompilation in Mozilla Firefox's DOM Core & HTML component enables memory corruption and limited information disclosure when a user visits a malicious web page. Affecting Firefox prior to 152, Firefox ESR 140.x prior to 140.12, and Firefox ESR 115.x prior to 115.37, the root cause is a type confusion (CWE-843) in the Just-In-Time compiler that mishandles type information during DOM object operations. No public exploit has been identified and CISA's SSVC rates exploitation as none with partial technical impact; vendor patches are confirmed across all three release channels.
Out-of-bounds read memory safety bug in Mozilla Firefox allows network-based attackers to cause limited confidentiality and integrity impact by luring users to visit crafted web content. All Firefox versions prior to 152 and Firefox ESR versions prior to 140.12 are affected, per Mozilla security advisories mfsa2026-57 and mfsa2026-58. No public exploit identified at time of analysis, and CISA SSVC assessment confirms no known active exploitation with only partial technical impact.
Cross-site scripting in DOMPurify ≤ 3.4.5 allows attacker-controlled event handlers, javascript: URIs, and template syntax to survive sanitization when the IN_PLACE: true API is used with an HTMLFormElement root. Two interacting bugs create the bypass: _forceRemove silently no-ops on detached (parent-less) nodes per WebIDL spec, and _sanitizeAttributes unconditionally early-returns on clobbered nodes under the now-broken assumption that _sanitizeElements already removed them. A publicly available working PoC has been verified against Chromium 148.0.7778.96 and DOMPurify 3.4.5 including the HEAD commit 89da34e, which addressed a related shadow-root traversal issue but left this main-pipeline path unpatched. No KEV listing is present at time of analysis.
SSRF filter bypass in Symfony's NoPrivateNetworkHttpClient permits requests to private IPv4 addresses to be smuggled via four classes of IPv6 transition encodings - 6to4 (2002::/16), NAT64 (64:ff9b::/96 and 64:ff9b:1::/48), Teredo (2001::/32), and IPv4-compatible (::/96) - none of which appeared in the IpUtils::PRIVATE_SUBNETS blocklist. Any Symfony application on versions 5.4.0-5.4.52 or 6.4.0-8.0.12 that uses NoPrivateNetworkHttpClient as its SSRF guard and accepts attacker-controlled URLs is vulnerable to the filter bypass; actual packet delivery to the embedded private IPv4 is additionally gated by the server's IPv6 routing configuration. No public exploit code has been released and this CVE is not in CISA KEV, but the bypass payloads are fully enumerated in the official security advisory.
An issue was discovered in Malwarebytes 4.x and 5.x (and Nebula 2020-10-21 and later). Rated medium severity (CVSS 6.2), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
JIT miscompilation in Firefox's JavaScript engine exposes users to a denial-of-service condition when visiting attacker-controlled web content. The vulnerability stems from a type confusion flaw (CWE-843) in the JIT compiler component, where incorrect type assumptions during optimization can corrupt memory state and crash the browser. No active exploitation has been confirmed (no CISA KEV listing), EPSS stands at 0.02% (5th percentile), and vendor-released patch Firefox 151.0.3 is available per Mozilla advisory mfsa2026-54.
Cross-site scripting in Firefox for iOS Reader View allows unauthenticated remote attackers to inject arbitrary markup via maliciously crafted JSON-LD metadata on attacker-controlled pages. When a victim activates Reader View on such a page, injected HTML executes in the context of an internal Firefox origin, leaking sensitive URL parameters that can be leveraged to access internal pages and achieve arbitrary JavaScript execution with elevated browser-origin trust. Mozilla patched this in Firefox for iOS 151.2 per MFSA2026-53; no public exploit code and no CISA KEV listing have been identified at time of analysis.
Reader View in Firefox for iOS executes arbitrary JavaScript due to an incorrect template substitution order, enabling cross-site scripting via JSON-LD data injection. The flaw affects all Firefox for iOS versions prior to 151.2 running on Apple iOS devices; unauthenticated remote attackers can exploit this by luring users to a malicious page and having them activate Reader View, after which attacker-controlled placeholder strings embedded in the page's structured data are processed as executable script. No public exploit has been identified at time of analysis and the vulnerability is not listed in CISA KEV, but the low attack complexity and no-auth-required access vector (per CVSS PR:N) make it feasible for opportunistic campaigns targeting iOS Firefox users.
Local SSRF in PraisonAI's direct-prompt CLI allows an attacker who can influence prompt text to cause the operator's machine to fetch loopback and private-network HTTP resources, injecting the response body into the LLM prompt context. Affected packages are pip/praisonai <= 4.6.39 and pip/praisonaiagents <= 1.6.39; patches are available in 4.6.40 and 1.6.40 respectively. Publicly available exploit code exists (confirmed working PoC in the GHSA advisory), no public exploit identified at time of analysis as confirmed actively exploited (CISA KEV listing absent), and the CVSS 5.5 score reflects a meaningful confidentiality impact (C:H) constrained by a local attack vector.
Firefox for iOS misrepresents attacker-controlled domains as trusted origins through improper rendering of right-to-left Unicode characters and internationalized domain names (IDNs) in the link preview UI surface, enabling a spoofing/phishing attack against users on any iOS version prior to 151.1. The CVSS vector (PR:N/UI:R) indicates unauthenticated network-reachable exploitation contingent on user interaction with a crafted link. EPSS at the 5th percentile and SSVC exploitation status of 'none' confirm no active exploitation or public exploit code has been identified at time of analysis, positioning this as a targeted phishing risk rather than a broad automated threat.
Firefox for iOS Reader mode exposed an unauthenticated local HTTP server on the device, enabling a co-installed malicious application to request arbitrary URLs through that server and receive responses rendered with the authenticated user's session cookies. Affected versions are all Firefox for iOS releases prior to 151.0, confirmed by Mozilla Security Advisory MFSA2026-49. No public exploit code has been identified and CISA SSVC rates exploitation as none at time of analysis, but successful exploitation would allow silent exfiltration of authenticated web content from the victim's active browsing session.
Same-origin policy bypass in Firefox's Networking: JAR component (all versions prior to Firefox 151) allows unauthenticated remote attackers to cross origin boundaries, enabling limited reads from and writes to content belonging to other origins. The CVSS 6.5 Medium score reflects partial confidentiality and integrity impact without availability consequence. No public exploit has been identified and CISA SSVC reports no active exploitation, though the attack is classified as automatable, meaning scripted mass-targeting would be feasible if a POC were released.
Spoofing via the Form Autofill component in Mozilla Firefox allows a network-based attacker to achieve high integrity impact against users who interact with attacker-controlled content. The CVSS vector (AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N) confirms no authentication is required from the attacker side, but a victim must interact with malicious content for the attack to succeed. No public exploit code has been identified at time of analysis, and EPSS sits at 0.02% (5th percentile), indicating very low observed exploitation probability; the vulnerability is not listed in the CISA KEV catalog.
Toolbar component spoofing in Firefox for Android allows a remote unauthenticated attacker to mislead users about the origin or security state of a web page, achieving high integrity impact without confidentiality or availability consequences. The vulnerability affects Firefox for Android versions prior to 151 and is classified under CWE-290 (Authentication Bypass by Spoofing), meaning the Toolbar UI element can be manipulated to present false trust signals. No public exploit exists and no active exploitation has been confirmed; Mozilla released a fix in Firefox 151, and the advisory is published at mfsa2026-46.
Stored cross-site scripting in AVideo's Live plugin allows authenticated streamers to inject malicious JavaScript into live stream pages, executing in any visitor's browser context. The vulnerability exists in modeYoutubeLive.php where stream keys are rendered unescaped into HTML class attributes. Attackers with canStream privileges can persist event handlers via crafted stream keys that trigger when victims view the live page, enabling session hijacking, CSRF token theft, and potential admin account compromise. CVSS 5.4 reflects network-accessible exploitation requiring only low-privilege authentication and user interaction, with scope change indicating cross-user impact. No patch is currently available per GitHub advisory GHSA-m5j4-7r85-2cj2.
Open WebUI versions up to 0.8.8 expose admin-configured system prompts to authenticated regular (non-admin) users through the /api/models API endpoint, allowing information disclosure of sensitive model instructions and internal configuration details. The vulnerability requires valid user authentication but no administrative privileges, enabling any authenticated user to retrieve confidential system prompts via a simple HTTP GET request. This is confirmed actively exploited in production deployments with a publicly available proof-of-concept.
linux-entra-sso, Siemens' Chrome browser extension for Microsoft Entra ID SSO on Linux, leaks the Entra ID Primary Refresh Token (PRT) cookie to attacker-controlled hosts due to missing URL origin validation in its Chrome adapter. Versions prior to 1.8.1 are affected; the Chrome adapter's declarativeNetRequest rule uses an unanchored urlFilter that performs substring matching, causing the PRT injection to fire on any request URL containing 'https://login.microsoftonline.com/' anywhere in the path - not just requests actually destined for Microsoft's login endpoint. A proof-of-concept exists per SSVC data, though exploitation is not confirmed in CISA KEV and EPSS is very low (0.03%), reflecting the niche product footprint and required user interaction.
Information disclosure vulnerability in Firefox's JavaScript Engine allows remote unauthenticated attackers to leak sensitive memory contents over the network without user interaction. The vulnerability affects Firefox versions prior to 150.0.3 and has a low EPSS score (0.02%) despite the network-based attack vector, suggesting limited real-world exploitation pressure despite the modest CVSS score of 5.3.
Mitigation bypass in Mozilla Firefox's DOM Notifications component allows remote attackers to defeat browser-enforced protections governing web notifications; it is fixed in Firefox 156 and Firefox ESR 153.3, so any earlier Firefox build or ESR build before 153.3 remains affected. Exploitation is remote and unauthenticated (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L, 6.3) but requires the victim to visit or interact with attacker-controlled web content, and impact is limited to low confidentiality, integrity, and availability effects within the browser process. No public exploit code is identified at time of analysis, EPSS places likelihood at roughly 0.16% (6th percentile), and CISA KEV does not list this issue, so real-world priority is low-to-moderate.
An information-disclosure weakness in the Graphics: ImageLib component of Mozilla Firefox allows remote attackers to expose sensitive data when a victim loads attacker-controlled image content; because the CVSS vector carries PR:N with UI:R, no authentication or privileges are needed but the victim must open the crafted content. Impact is limited to confidentiality loss (C:H with I:N/A:N), so it is a moderate-severity flaw rather than a code-execution or availability risk. Mozilla fixed it in Firefox 156, Firefox ESR 140.16, and Firefox ESR 153.3, and EPSS is low at 0.16% (5th percentile) with no public exploit identified at time of analysis and no CISA KEV listing.
A protection-mechanism bypass in Firefox's DOM Copy & Paste and Drag & Drop component lets attacker-controlled web content escape an intended security mitigation (CWE-693), yielding limited confidentiality and integrity impact. All Firefox builds prior to 156, Firefox ESR prior to 140.16, and Firefox ESR prior to 153.3 are affected. Exploitation is unauthenticated (PR:N) but requires the victim to visit attacker-controlled content and then perform a copy-paste or drag-and-drop action (UI:R); there is no public exploit identified at time of analysis and EPSS is a low 0.16% (6th percentile). This is a moderate, low-priority browser bug, not a remote-code-execution issue.
Use-after-free in Mozilla Firefox's Audio/Video: Web Codecs component allows a remote attacker to crash the browser's content process by getting a victim to load crafted media that is decoded or encoded through the WebCodecs API. The issue affects Firefox builds prior to 156 and the ESR branches prior to 140.16 (ESR 140) and 153.3 (ESR 153), and has been fixed by Mozilla in those releases. Impact is confined to availability - the memory-safety bug is not assessed as enabling code execution or data theft - and every quantitative signal points to low real-world priority: EPSS is just 0.16% (5th percentile), there is no CISA KEV listing, and no public exploit code has been identified at time of analysis. Note that NVD publishes this as AV:N/AC:L/PR:N/UI:N, while our assessment reclassifies it as UI:R because exploitation realistically requires the victim to render attacker-controlled media.
Repeated external URL scheme invocations from a malicious webpage can flood Firefox for iOS with system confirmation prompts or trigger cascading external application launches, rendering the browser temporarily unusable. All Firefox for iOS versions prior to 155.1 on Apple iOS devices are affected. No active exploitation has been identified; Mozilla released the fix in Firefox for iOS 155.1, and exploitation requires the user to visit the attacker-controlled page.
Clickjacking in Firefox's DOM Events component allows an unauthenticated remote attacker to redirect a victim's browser interactions from an overlaid or framed context, resulting in limited confidentiality and integrity impact across an origin boundary. All Firefox versions prior to 155 and Firefox ESR versions prior to 153.2 are affected, per multiple Mozilla security advisories (mfsa2026-82, mfsa2026-85, mfsa2026-86, mfsa2026-88). No public exploit has been identified at time of analysis, and the EPSS score of 0.14% (4th percentile) reflects very low observed exploitation probability.
Uncontrolled resource consumption in Mozilla Firefox's built-in PDF Viewer component allows a remote, unauthenticated attacker to crash or hang the browser by inducing a victim to open a specially crafted PDF file. All Firefox releases prior to version 155 are affected, as confirmed by Mozilla Security Advisories MFSA2026-82 and MFSA2026-86. No public exploit code or CISA KEV listing has been identified, and EPSS at 0.14% (4th percentile) reflects very low real-world exploitation probability.
Spoofing via origin validation failure in Firefox's DOM Core & HTML component allows a remote unauthenticated attacker to misrepresent content origin within the browser, achieving low-integrity impact against users of all Firefox versions before 155 and Firefox ESR before 153.2. The vulnerability class (CWE-346, Origin Validation Error) indicates the browser fails to correctly enforce the origin of DOM operations or HTML content, enabling cross-origin content spoofing. Multiple Mozilla Security Advisories (mfsa2026-82, -85, -86, -88) confirm the fix; EPSS of 0.14% (4th percentile) and absence from CISA KEV indicate no active exploitation at this time.
Cross-site scripting in Firefox's DOM Navigation component allows a remote unauthenticated attacker to inject and execute script content across security origins when a victim visits a specially crafted webpage. The vulnerability is classified CWE-79 with scope change (S:C), indicating potential cross-origin impact beyond the attacked page. Mozilla patched this in Firefox 155 and Firefox ESR 153.2, with coverage across multiple advisory tracks (mfsa2026-82, -85, -86, -88). No public exploit code or active exploitation has been identified at time of analysis.
Information disclosure in Firefox for Android's WebExtensions component exposes sensitive browser or cross-origin data to remote attackers who can induce user interaction. Affecting all Firefox for Android versions prior to 155, the flaw is accessible over the network with low complexity but requires a user to interact with attacker-controlled content, gating mass exploitation. No public exploit identified at time of analysis, and the vulnerability is not listed in CISA KEV.
Incorrect boundary conditions in Firefox's CSS Grid layout engine expose limited browser process memory to remote attackers who deliver crafted web content. All Firefox versions prior to 155 are affected; exploitation requires a victim to visit or render attacker-controlled content, producing low-level confidentiality disclosure with no integrity or availability impact. Mozilla issued the fix in Firefox 155 via MFSA2026-82; no public exploit code and no CISA KEV listing have been identified at time of analysis.
Use-after-free in Firefox's DOM Core & HTML component allows network-reachable attackers to achieve limited memory disclosure and DOM integrity impact against users running Firefox below version 155 or Firefox ESR below 153.2. Exploitation requires user interaction - a victim must visit or be redirected to attacker-controlled content - but no authentication or elevated privileges are needed. No public exploit code or active exploitation (CISA KEV) has been identified at time of analysis; Mozilla has released patched versions addressing the flaw.
Use-after-free memory corruption in Firefox's DOM Core and HTML component allows a remote attacker to achieve limited confidentiality and integrity impact against users running unpatched Firefox versions by directing them to a crafted webpage. All Firefox releases prior to version 155, ESR 140.15, and ESR 153.2 are affected; Mozilla has shipped fixes across all three release channels. No public exploit code or active exploitation has been identified at time of analysis.
Use-after-free in Firefox's Audio/Video media pipeline allows unauthenticated remote attackers - requiring only user interaction - to read or modify limited browser memory content. Affected releases span Firefox stable prior to 155 and both ESR tracks prior to 140.15 and 153.2, covered by three separate Mozilla security advisories (MFSA2026-82, MFSA2026-84, MFSA2026-85). No public exploit code exists at time of analysis and SSVC exploitation status is 'none,' though the CWE-416 class carries inherent escalation risk beyond the partial impact Mozilla scored.
Use-after-free in Firefox's JavaScript garbage collector (GC) component exposes users to partial memory disclosure and corruption when visiting attacker-controlled web pages. Both the standard release line (Firefox 155) and the extended support release (Firefox ESR 153.2) are patched. No public exploit or active exploitation is confirmed; SSVC exploitation status is none and the vulnerability is absent from CISA KEV.
Use-after-free in Firefox's Audio/Video component exposes users running Firefox prior to version 155 and affected ESR branches to potential heap memory disclosure and limited data modification when processing attacker-controlled media. The vulnerability is network-reachable but requires user interaction - visiting a malicious or compromised page that triggers media playback - and carries a CVSS score of 5.4 reflecting bounded C:L/I:L impact with no availability loss. No public exploit code or active exploitation has been identified at time of analysis; SSVC assessment classifies exploitation status as none and the vulnerability as non-automatable.
Address bar spoofing in Firefox for iOS lets a malicious webpage stall a popup's cross-origin navigation after the browser internally commits it, causing the address bar to display the intended destination's origin while the popup continues rendering attacker-controlled content. All Firefox for iOS releases prior to 155.0 are affected; the fix shipped in version 155.0 per Mozilla advisory MFSA2026-81. No public exploit has been identified and CISA SSVC confirms exploitation status as none, but the phishing potential is realistic given the deceptive UI state.
Stored XSS in PrivateBin versions up to 2.0.4 allows an anonymous attacker to attach a text/html file to a paste such that, when a victim opens the download link in a new tab, the attacker's inline JavaScript executes in the PrivateBin instance's web origin with full same-origin capability including localStorage access and same-origin fetch. This is an incomplete fix for CVE-2022-24833: the 2022 patch only sanitized the preview blob for SVG files but never updated the download link's blob, leaving all non-SVG active content types-including text/html-completely bypassing DOMPurify. A detailed proof-of-concept demonstrating exploitation with Playwright/Chromium automation is publicly available in GitHub Security Advisory GHSA-f2xf-7x3g-4272; no public exploit identified as confirmed actively exploited per CISA KEV.
Froxlor's standalone AJAX endpoint (lib/ajax.php) entirely bypasses the CSRF token enforcement present in lib/init.php, allowing a remote attacker to forge state-changing POST requests on behalf of any authenticated administrator who visits a malicious page. Successful exploitation modifies administrator API key properties - specifically injecting the attacker's IP into the allowed_from whitelist and setting valid_until to -1 (never expires) - creating a persistent foothold for future API abuse if the API secret is later obtained. A working proof-of-concept HTML page is included in the public GitHub security advisory (GHSA-xpr4-8vp6-c87j); no CISA KEV listing found at time of analysis. EPSS data was not provided, but the UI:R requirement and niche product footprint constrain real-world exploitation.
Race condition in Firefox's JavaScript Engine (CVE-2026-74984) exposes users on all Firefox versions prior to 154 and ESR versions prior to 153.1 to potential confidentiality and integrity compromise. The CWE-362 flaw creates a timing window during concurrent JavaScript execution in which an attacker-controlled script can race against the engine's internal state management, enabling memory read or write access. No public exploit code has been identified and EPSS sits at the 5th percentile, indicating no widespread exploitation at time of analysis.
Clickjacking in Firefox for Android's Downloads component enables remote attackers to trick users into performing unintended download-related actions through UI redress. All Firefox for Android versions prior to 154 are affected, with the fix confirmed in Mozilla Security Advisory mfsa2026-74. No public exploit has been identified at time of analysis, and the EPSS score of 0.14% (4th percentile) reflects very low observed exploitation probability.
UI spoofing in the Downloads component of Firefox for Android allows network-accessible attackers to misrepresent critical information to users, potentially deceiving them about the nature or origin of downloaded content. Affected versions are those prior to Firefox 154 on Android, as confirmed by Mozilla's security advisory MFSA2026-74. No public exploit code exists and CISA has not added this to the KEV catalog; SSVC signals exploitation status as none with partial technical impact.
Site isolation bypass in Firefox's Graphics component allows a remote attacker who can induce user interaction to read cross-origin data or tamper with content across site boundaries. Affected versions are all Firefox releases prior to 154 and all Firefox ESR releases prior to 153.1. No public exploit has been identified and CISA SSVC rates exploitation as none at time of analysis, but the network-accessible attack surface and broad deployment footprint make this a meaningful patching priority.
Site isolation bypass in Firefox's Graphics: WebRender component allows a remote attacker to achieve limited cross-origin information disclosure and content manipulation by delivering a crafted webpage to a user (CWE-346, origin validation error). All Firefox releases prior to 154 and Firefox ESR releases prior to 153.1 are affected across all platforms. No public exploit code or active exploitation has been identified at time of analysis, and the vulnerability is not listed in the CISA KEV catalog.
Clickjacking in Firefox for Android before version 154 allows remote unauthenticated attackers to overlay transparent or opaque UI frames over legitimate browser content, capturing user interactions intended for other elements. The CVSS vector (PR:N, UI:R, I:H) indicates no privileges are needed but a victim must interact with an attacker-controlled page, resulting in high-integrity impact through unintended user actions such as inadvertent permission grants or form submissions. No public exploit identified at time of analysis, and this vulnerability is not listed in the CISA KEV catalog.
JIT miscompilation in Firefox's SpiderMonkey JavaScript engine exposes sensitive memory to remote attackers via crafted web content. The CWE-843 (type confusion) root cause means the JIT compiler generates native code that accesses a JavaScript value as the wrong type, resulting in a high-confidentiality information disclosure. Vendor-released patches are available in Firefox 154, Firefox ESR 140.14, and Firefox ESR 153.1; no public exploit or CISA KEV listing has been identified at time of analysis.
Same-origin policy bypass in Firefox's ImageLib image rendering component allows remote attackers to read cross-origin data or perform unauthorized cross-origin writes against victims using unpatched browser versions. Affected releases span the main Firefox channel (prior to 154) and three ESR branches (prior to ESR 115.39, ESR 140.14, and ESR 153.1), placing a large share of the global Firefox install base at risk until patched. The CVSS 5.4 score reflects limited confidentiality and integrity impact with no authentication requirement on the attacker side, though no public exploit has been identified and this CVE is not listed in the CISA KEV catalog at the time of analysis.
Race condition and use-after-free memory corruption in Mozilla Firefox's Graphics component allows remote unauthenticated attackers to achieve limited confidentiality and integrity impact when a user visits a malicious web page. Affected across the standard release channel and all ESR branches, the vulnerability is fixed in Firefox 154, ESR 115.39, ESR 140.14, and ESR 153.1 per Mozilla's official advisories. No public exploit code has been identified and CISA has not listed this in KEV; the SSVC framework rates exploitation status as none and marks it not automatable.
Information disclosure through Firefox's DOM Push Subscriptions component exposes limited confidential data to network-positioned attackers who can induce user interaction. All Firefox releases prior to 154 and both Firefox ESR branches (pre-140.14 and pre-153.1) are affected, with Mozilla issuing at least six security advisories (mfsa2026-74 through mfsa2026-80) addressing this and related issues. No public exploit code or CISA KEV listing has been identified at time of analysis, and the CVSS 4.3 Medium rating reflects the limited scope of data exposed and the mandatory user-interaction requirement.
Information disclosure in Firefox's DOM UI Events and Focus Handling component exposes limited sensitive data to remote attackers when a victim visits a crafted web page. All Firefox releases prior to 154, ESR prior to 140.14, and ESR 153.x prior to 153.1 are affected across all platforms, as confirmed by Mozilla across six simultaneous security advisories (mfsa2026-74 through mfsa2026-80). No active exploitation has been confirmed (not in CISA KEV) and no public exploit code has been identified; real-world risk is moderated by the required user interaction and limited confidentiality-only impact.
Same-origin policy bypass in Firefox's Audio/Video Playback component exposes users to cross-origin data reads and limited content manipulation when visiting a malicious webpage. All Firefox stable releases prior to 154 and both ESR tracks prior to 140.14 and 153.1 are affected, with Mozilla issuing a coordinated advisory series (mfsa2026-74 through mfsa2026-80) covering the full release matrix. No public exploit code or CISA KEV listing has been identified at time of analysis; exploitation requires user interaction but no credentials or special configuration.
Same-origin policy bypass in Firefox's Networking: Cookies component exposes users to cross-origin cookie theft and manipulation when visiting attacker-controlled pages. All Firefox versions prior to 154 and both ESR branches prior to ESR 140.14 and ESR 153.1 are affected, with Mozilla publishing at least six separate security advisories (mfsa2026-74 through mfsa2026-80) indicating broad coverage across release tracks. No public exploit code or active exploitation via CISA KEV has been identified at time of analysis; the CVSS 5.4 Medium score reflects real but bounded confidentiality and integrity risk, gated by a mandatory user-interaction requirement.
Information disclosure in Firefox's Graphics component exposes sensitive data to remote attackers who can lure users to a malicious webpage. All Firefox release channels prior to version 154 and multiple ESR branches are affected, with fixes shipping in Firefox 154, ESR 115.39, ESR 140.14, and ESR 153.1. No public exploit code has been identified and exploitation probability is very low (EPSS 0.16%), though the high confidentiality impact and zero-privilege-required attack path make patching a straightforward priority.
Information disclosure in Firefox's Graphics: Text rendering component allows a remote unauthenticated attacker to leak sensitive memory contents when a user visits or interacts with crafted content. All Firefox release channels are affected, spanning the main release (pre-154) and three ESR branches (pre-115.39, pre-140.14, pre-153.1). No public exploit code exists and EPSS exploitation probability sits at just 0.20% (10th percentile), suggesting low real-world exploitation activity despite the high confidentiality impact scored by CVSS.
Predictable temporary file paths in Etherpad's import and export handlers expose multi-tenant deployments to a symlink-based file overwrite attack. All ep_etherpad-lite versions through v3.0.0 are affected; exploitation requires local host access, an unprivileged OS account, and - for high-impact scenarios - the Etherpad process running as root, a common default in many Docker base images. A proof-of-concept sketch is included in the vendor advisory GHSA-2jwf-f4xq-f24h; no public weaponized exploit code beyond that sketch exists and this vulnerability is not listed in the CISA KEV catalog.
Information disclosure in Firefox for Android and Firefox Focus for Android exposes sensitive user data to network-based attackers who can lure a victim into interacting with a crafted web resource. The vulnerability, tracked under CWE-200 and assigned a CVSS score of 6.5 with high confidentiality impact, is limited to Android platform builds and does not affect desktop Firefox. Mozilla patched this in Firefox 153.0.3 per advisory mfsa2026-73; no public exploit or active exploitation has been identified at time of analysis.
Uncontrolled resource consumption in dompdf's BMP image processing pipeline allows any unauthenticated attacker who can submit HTML to a dompdf-powered endpoint to exhaust server memory and stall PHP-FPM worker pools with a 169-byte HTTP request. The library trusts attacker-controlled BMP header dimensions without bounding width × height, causing PHP's GD extension to allocate a full native pixel canvas - bypassing PHP's memory_limit entirely because GD allocates through its own native allocator. A publicly available, verified proof-of-concept demonstrates ~12× memory amplification (34 MB control vs ~412 MB attack peak RSS) from identically-sized requests, making this a high-impact, low-effort denial-of-service primitive. No active exploitation confirmed in CISA KEV at time of analysis.
Public-only personal access token scope enforcement in Gitea's REST API is inconsistently applied across two organization endpoints, allowing a token holder to enumerate private organization memberships and retrieve detailed permission data (ownership, admin status, write access, repository-creation capability) that the public-only restriction was explicitly designed to block. All Gitea versions prior to 1.27.0 are affected via GET /api/v1/user/orgs and GET /api/v1/users/{username}/orgs/{org}/permissions. Publicly available exploit code with full HTTP request/response traces is confirmed in the GHSA advisory; no CISA KEV listing exists, indicating no confirmed opportunistic mass exploitation at time of analysis.
Draft release attachment disclosure in Gitea exposes files uploaded to draft releases to unauthenticated network callers via UUID-based web endpoints, bypassing access controls that correctly gate the parallel API handlers. This is an incomplete fix for CVE-2026-27660: that advisory's PR #36659 added `canAccessReleaseDraft` checks to every API code path but left the web-side `ServeAttachment` handler ungated, allowing anyone who obtains an attachment UUID to download its contents with no authentication. A working proof-of-concept is documented in the advisory and confirmed against Gitea v1.27.0+dev; no public exploit identified at time of analysis beyond the advisory PoC, and the vulnerability does not appear in CISA KEV.
Address bar spoofing in Mozilla Firefox (all versions prior to 153) enables a remote, unauthenticated attacker to misrepresent the displayed origin in the browser's address bar, the primary trust signal users rely on to validate site authenticity. The CVSS vector (AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N) confirms exploitation is low-complexity and requires only a single user interaction - navigating to a crafted page - with no authentication or special privileges needed from the attacker. No public exploit has been identified and EPSS sits at 0.13% (3rd percentile), indicating limited exploitation activity; however, the integrity of user trust decisions is fully undermined when the flaw is triggered, making it an effective phishing enabler.
Clickjacking (UI redressing) in the WebExtensions component of Firefox for Android allows a network-based attacker to hijack user interactions, resulting in high-integrity impact against the victim's browser session. All Firefox for Android versions prior to 153 are affected; Mozilla has released a fix in Firefox 153. No public exploit code has been identified and this vulnerability is not listed in the CISA KEV catalog at time of analysis.
Drive-by local filesystem exfiltration in FiftyOne versions below 1.17.0 allows any malicious website to silently read arbitrary files from a victim's machine. The FiftyOne App server unconditionally returns Access-Control-Allow-Origin: * on all responses, and the unauthenticated /media endpoint serves local filesystem files by path - together these let JavaScript on any visited webpage fetch files such as SSH keys, cloud credentials, or .env files from localhost:5151 and relay them to an attacker-controlled server. No public exploit (KEV or confirmed POC) is identified at time of analysis, but the attack requires no special tooling and is trivially reproducible in Safari and Firefox, which lack Private Network Access protections.
Fullscreen mode in Zen Browser desktop prior to 1.19.13b exposes users to credential-theft phishing by failing to display a persistent, visible security notification when a webpage enters fullscreen. An attacker-controlled page can completely occlude the real browser chrome - including the address bar and origin indicators - then render a convincing imitation of a trusted site's login interface. When combined with long-domain URL eliding, this allows precise origin spoofing; no public exploit has been identified at time of analysis, and the CVSS 4.0 score of 6.3 reflects high subsequent-system integrity and confidentiality impacts despite the attack requiring user interaction.
Firefox versions prior to 152.0.6 are exposed to a network-exploitable flaw requiring user interaction that yields limited confidentiality and integrity impact within the browser context. Publicly available exploit code exists, confirmed by Mozilla's own advisory language, though the vendor reports no known attacks in the wild at time of disclosure. The fix is confirmed in Firefox 152.0.6, referenced in Mozilla security advisory MFSA2026-67.
Information disclosure in Mozilla Firefox via CWE-763 (Release of Invalid Pointer or Reference) allows network-based attackers to read limited memory contents from affected browser instances. All Firefox versions prior to 152.0.6 are affected. Publicly available exploit code exists, though Mozilla reports no confirmed attacks in the wild; user interaction is required to trigger the flaw, moderately reducing real-world exposure.
PDF save functionality in Firefox for iOS allows maliciously crafted page titles to manipulate the output file path, enabling overwrites of existing PDF files or bundled application content within the Firefox iOS sandbox. All versions prior to 152.4 on Apple iOS devices are affected. An attacker operating a malicious website can lure a user into saving a page as PDF, causing the crafted title to resolve to an unintended file path within the app sandbox - potentially corrupting application state or stored documents. No public exploit has been identified at time of analysis, though SSVC classifies the vulnerability as automatable with partial technical impact.
Open redirect bypass in openrun prior to v0.17.7 allows remote unauthenticated attackers to redirect victims to arbitrary external URLs by exploiting a double-slash path prefix that evades the application's host/scheme validation. The referrer-based redirect logic correctly validates the host and scheme but passes the extracted path `//attacker.com` to the Location header, which browsers interpret as a protocol-relative URL and resolve to an external destination. A proof-of-concept is publicly documented in the security advisory; no active exploitation has been confirmed by CISA KEV at time of analysis.
System principal privilege escalation in Zen Browser prior to 1.21.5b allows a malicious webpage to bypass Firefox's content-to-file security boundary by exploiting the browser's custom glance and split-view context-menu features. The 'Open link in glance' and 'Split link in new tab' actions navigate attacker-supplied file:// URLs using the System principal rather than the originating page's content principal, granting access to local filesystem contents that would be blocked by an ordinary click. A vendor-released patch exists in version 1.21.5b; no public exploit has been identified at time of analysis.
Address bar spoofing in Firefox for iOS allows a remote unauthenticated attacker to display a trusted origin in the browser's address bar while the victim views and interacts with fully attacker-controlled content - a classic and effective phishing enabler. The attack exploits a race condition in navigation handling: a malicious page enqueues a synchronous JavaScript dialog at the moment a user navigates away, freezing the address bar on the destination's legitimate origin while the malicious page's content continues to render. No public exploit code has been identified and EPSS is 0.15% (4th percentile), indicating no observed widespread exploitation; however, the technique is conceptually simple and phishing value is high.
HTML injection via Matrix and XMPP chat in Mozilla Thunderbird allows remote network-accessible attackers to inject arbitrary styled content, phishing links, and CSS that manipulates the chat UI without any authentication. All Thunderbird versions prior to 152.0.1 and 140.12.1 ESR are affected. No public exploit has been identified and EPSS sits at 0.14% (4th percentile), but SSVC flags the attack as automatable with partial technical impact, making it a realistic phishing and UI-deception vehicle for anyone reachable via federated Matrix or XMPP.
Memory exhaustion denial-of-service in Mozilla Thunderbird's LDAP address-book autocomplete client allows a malicious or compromised LDAP server to crash the application by returning unbounded data payloads. Affected users are those explicitly configured to query an LDAP directory server for autocomplete, making this a targeted rather than opportunistic attack. No public exploit has been identified at time of analysis, and EPSS at 0.14% (4th percentile) alongside a CISA SSVC exploitation rating of 'none' confirms very low real-world urgency.
Open redirect bypass in Miniflux v2 (versions <= 2.3.0) enables unauthenticated remote attackers to redirect victims to arbitrary external URLs by exploiting a backslash normalization discrepancy between server-side URL validation and browser behavior. The self-hosted RSS reader's login handler accepts a redirect_url parameter validated by an IsRelativePath function that blocks // prefixes but permits /\attacker.com - a string that all major browsers (Chrome, Firefox, Safari, Edge, as indicated by advisory tags) silently normalize to //attacker.com during HTTP Location header processing. A publicly documented proof-of-concept is available via GHSA-m999-j542-5w3r; no active exploitation has been confirmed in CISA KEV at time of analysis.
Cookie injection in Firefox for iOS (all versions prior to 152.0) arises from the browser's TemporaryDocument PDF handling mechanism incorrectly preserving cookies from an initial PDF request across cross-origin HTTP redirects. This violates same-origin cookie isolation, enabling a malicious site to inject arbitrary cookies into requests directed at an unrelated target domain and potentially manipulate session or authentication state on that domain. No public exploit code has been identified and no CISA KEV listing exists; the CVSS vector (AV:N/AC:L/PR:N/UI:R) indicates low-complexity remote exploitability contingent on user interaction, and Mozilla has shipped a vendor-released patch in Firefox for iOS 152.0.
Cookie leakage in Firefox for iOS prior to 152.0 allows an attacker-controlled suffix domain to intercept cookies intended for a target site during PDF request handling. The browser's PDF loading code path applied partial rather than exact-origin domain matching when deciding which cookies to attach, meaning a domain such as 'evilbank.com' could satisfy a suffix match against 'bank.com' and receive that site's cookies. No active exploitation is confirmed, but the SSVC framework rates this as automatable with partial technical impact, making it a credible session-hijacking vector for users on unpatched versions.
Incorrect boundary conditions in Mozilla Firefox's Internationalization component allow a network-accessible attacker to cause limited memory corruption, resulting in partial confidentiality and integrity compromise. Affected versions include all Firefox ESR releases prior to 140.12 and 115.37; vendor-released patches are available in both ESR branches. No public exploit has been identified at time of analysis, CISA has not added this to its Known Exploited Vulnerabilities catalog, and EPSS scores exploitation probability at a very low 0.16% (6th percentile), suggesting limited real-world attacker interest.
Memory safety vulnerability (CWE-119 buffer overflow class) in Mozilla Firefox ESR prior to version 140.12 enables remote unauthenticated attackers to cause a partial denial of service by triggering a browser crash. The CVSS vector confirms network delivery with no privileges or user interaction required per vendor scoring, and impact is limited strictly to availability (A:L) with no confidentiality or integrity consequences. No public exploit code has been identified at time of analysis, and EPSS at 0.25% (16th percentile) places this well below typical exploitation thresholds despite its automatable delivery vector.
Uncontrolled resource consumption in Mozilla Firefox's Graphics: ImageLib component allows remote attackers to crash or hang the browser by serving specially crafted image content to an unsuspecting user. All Firefox release-channel versions prior to 152 and both ESR tracks (prior to 140.12 and 115.37) are affected, exposing a broad install base across consumer and enterprise environments. No public exploit has been identified, SSVC rates exploitation as none with a non-automatable attack path, and KEV listing is absent - signals that collectively place this vulnerability at lower real-world priority despite a CVSS 6.5 score.
Spoofing via CWE-1021 (UI layer restriction failure) in Mozilla Firefox's DOM Core & HTML component allows remote unauthenticated attackers to render deceptive UI content in a victim's browser when they interact with a malicious web page. All Firefox versions prior to 152 are affected. No public exploit has been identified at time of analysis, and CISA SSVC assessment classifies exploitation status as none with partial technical impact, placing real-world urgency below the moderate CVSS score suggests.
Clickjacking via the Widget: Gtk component in Mozilla Firefox allows a remote, unauthenticated attacker to deceive users on Linux desktop systems into unintended interactions with improperly restricted GTK-rendered browser UI layers. All Firefox versions prior to 152 on GTK-based Linux platforms are affected, with fixes confirmed in Mozilla Foundation Security Advisories MFSA2026-57 and MFSA2026-60. No public exploit is identified at time of analysis; SSVC rates exploitation as 'none' and EPSS sits at 0.17% (6th percentile), indicating negligible active exploitation pressure despite the network-accessible attack vector.
JIT miscompilation in Mozilla Firefox's WebAssembly component (all versions prior to Firefox 152) exposes users to partial confidentiality and integrity compromise when visiting attacker-controlled web content. The flaw stems from incorrect control flow implementation (CWE-670) in the JIT compiler when processing crafted WebAssembly bytecode, resulting in erroneous native code generation that can allow limited memory reads or unintended writes. No active exploitation is confirmed - the vulnerability is absent from CISA KEV, EPSS is at the 5th percentile (0.16%), and SSVC marks exploitation as 'none' - placing this firmly in routine patch priority despite its network-accessible attack vector. Mozilla has released a fix in Firefox 152 via advisories MFSA2026-57 and MFSA2026-60.
Information disclosure in Firefox's Password Manager component allows a network-based attacker to partially expose sensitive credential data by inducing a user to interact with attacker-controlled content, affecting all Firefox versions prior to 152. The CVSS vector (AV:N/PR:N/UI:R/C:L) confirms no attacker authentication is required, but user interaction is mandatory, limiting automated exploitation. EPSS at 0.18% (8th percentile) and SSVC exploitation status of 'none' indicate negligible real-world exploitation pressure at time of analysis; no public exploit code has been identified.
Denial-of-service in Mozilla Firefox's Audio/Video Playback component allows a remote attacker to crash or render the browser unresponsive by delivering crafted media content to a victim. All Firefox releases prior to version 152 are affected per CPE coverage. No public exploit has been identified at time of analysis, and SSVC rates exploitation as none with partial technical impact, placing this in the moderate-priority tier rather than an emergency response category.
Sandbox escape with information disclosure in Mozilla Firefox's Process Sandboxing component allows a remote attacker to break out of the browser sandbox and read sensitive data from the host environment when a user visits attacker-controlled content. Affected versions span all Firefox releases prior to 152 and all Firefox ESR releases prior to 140.12, patched by Mozilla in mfsa2026-57 and mfsa2026-58. No public exploit identified at time of analysis and SSVC signals no current exploitation activity, keeping real-world urgency at moderate priority despite the scope-changing nature of the flaw.
Firefox's Process Sandboxing component allows information disclosure and partial sandbox escape when a user visits a specially crafted webpage, affecting all Firefox versions prior to 152 and Firefox ESR prior to 140.12. The CVSS Scope:Changed metric confirms the flaw crosses the sandbox boundary, while impact is constrained to low confidentiality disclosure with no integrity or availability consequence. No public exploit code exists and SSVC confirms no known exploitation; EPSS at 0.18% (8th percentile) reinforces this is a lower-priority real-world threat despite the sandbox-crossing nature of the bug.
Memory safety violation (CWE-119) in Mozilla Firefox allows remote attackers without authentication or elevated privileges to achieve limited confidentiality breach and availability disruption against unpatched browser instances. Affected versions include all Firefox releases prior to 152 and all Firefox ESR releases prior to 140.12, with patches confirmed released by Mozilla across advisories mfsa2026-57, mfsa2026-58, mfsa2026-60, and mfsa2026-61. No public exploit code has been identified and the vulnerability is absent from the CISA KEV catalog; EPSS probability sits at 0.25% (16th percentile), consistent with SSVC exploitation status of 'none' - suggesting low current threat actor interest despite an automatable attack surface.
Memory safety vulnerability (CWE-119) in Mozilla Firefox prior to version 152 and Firefox ESR prior to 140.12 allows remote unauthenticated attackers to achieve partial information disclosure via a crafted web interaction that triggers an out-of-bounds memory operation. The CVSS vector (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N) reflects network reachability without credentials, though impact is confined to limited confidentiality loss with no integrity or availability consequences. No public exploit code has been identified, EPSS stands at 0.28% (19th percentile), and CISA has not listed this in the Known Exploited Vulnerabilities catalog - signals that consistently point to low near-term exploitation risk.
Memory safety buffer-handling flaw in Mozilla Firefox before version 152 and Firefox ESR before 140.12 enables remote unauthenticated attackers to achieve partial confidentiality impact - likely through memory content disclosure - via a network-accessible attack path requiring no user privileges. No public exploit code has been identified at time of analysis, and CISA has not listed this in the Known Exploited Vulnerabilities catalog. EPSS probability stands at 0.28% (19th percentile), consistent with SSVC's 'exploitation: none' classification, indicating low near-term exploitation likelihood despite the automatable attack path.
Memory safety bug (CWE-119, buffer bounds violation) in Mozilla Firefox prior to version 152 exposes limited memory contents to remote attackers without requiring authentication or user interaction per the supplied CVSS vector. Affected across all Firefox versions before 152 and ESR versions before 140.12, with multiple Mozilla security advisories (mfsa2026-57, mfsa2026-58, mfsa2026-60, mfsa2026-61) issued simultaneously, suggesting a coordinated release addressing this class of flaw. No active exploitation is confirmed (not in CISA KEV), and EPSS is very low at 0.28% (19th percentile), though SSVC flags the attack as automatable with partial technical impact.
Out-of-bounds read in Firefox's WebGPU graphics component exposes browser memory contents to remote attackers who can lure a user to a malicious webpage. All Firefox versions prior to 152 are affected, with the vulnerability stemming from incorrect boundary conditions during GPU-accelerated rendering operations. No public exploit or active exploitation has been identified at time of analysis; exploitation requires user interaction, limiting opportunistic mass exploitation despite the zero-authentication requirement on the attacker side.
Protection mechanism failure in Mozilla Firefox's DOM Security component permits remote unauthenticated attackers to bypass browser security mitigations, resulting in partial confidentiality and integrity compromise. All Firefox versions prior to 152, Firefox ESR prior to 140.12, and Firefox ESR 115.x prior to 115.37 are affected across major Linux distributions including Red Hat and SUSE. No active exploitation is confirmed (absent from CISA KEV, EPSS at 0.28%), though SSVC classifies the vulnerability as automatable, meaning mass-scale delivery via malvertising or phishing infrastructure is technically feasible if weaponized.
Memory safety bug (CWE-119, buffer overflow class) in Mozilla Firefox prior to version 152 exposes a limited portion of browser memory to remote attackers via network-delivered content. The CVSS 3.1 vector (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N) reflects a network-exploitable, unauthenticated path with partial confidentiality impact only - no integrity or availability consequences are indicated. No public exploit has been identified at time of analysis, EPSS is low at 0.27% (18th percentile), and CISA SSVC confirms no observed exploitation, placing this in the moderate-priority tier despite its wide network attack surface.
Memory safety buffer overflow in Mozilla Firefox (all versions prior to 152) allows remote unauthenticated attackers to read partial process memory contents via network-accessible browser processing paths. The CVSS vector (AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N) confirms no privileges or user interaction beyond normal browser activity are required, though impact is bounded to low confidentiality disclosure with no integrity or availability consequence. No public exploit has been identified at time of analysis, EPSS stands at 0.27% (18th percentile), and SSVC confirms zero observed exploitation - placing this in the patch-in-normal-cycle category rather than emergency response.
JIT miscompilation in Mozilla Firefox's DOM Core & HTML component enables memory corruption and limited information disclosure when a user visits a malicious web page. Affecting Firefox prior to 152, Firefox ESR 140.x prior to 140.12, and Firefox ESR 115.x prior to 115.37, the root cause is a type confusion (CWE-843) in the Just-In-Time compiler that mishandles type information during DOM object operations. No public exploit has been identified and CISA's SSVC rates exploitation as none with partial technical impact; vendor patches are confirmed across all three release channels.
Out-of-bounds read memory safety bug in Mozilla Firefox allows network-based attackers to cause limited confidentiality and integrity impact by luring users to visit crafted web content. All Firefox versions prior to 152 and Firefox ESR versions prior to 140.12 are affected, per Mozilla security advisories mfsa2026-57 and mfsa2026-58. No public exploit identified at time of analysis, and CISA SSVC assessment confirms no known active exploitation with only partial technical impact.
Cross-site scripting in DOMPurify ≤ 3.4.5 allows attacker-controlled event handlers, javascript: URIs, and template syntax to survive sanitization when the IN_PLACE: true API is used with an HTMLFormElement root. Two interacting bugs create the bypass: _forceRemove silently no-ops on detached (parent-less) nodes per WebIDL spec, and _sanitizeAttributes unconditionally early-returns on clobbered nodes under the now-broken assumption that _sanitizeElements already removed them. A publicly available working PoC has been verified against Chromium 148.0.7778.96 and DOMPurify 3.4.5 including the HEAD commit 89da34e, which addressed a related shadow-root traversal issue but left this main-pipeline path unpatched. No KEV listing is present at time of analysis.
SSRF filter bypass in Symfony's NoPrivateNetworkHttpClient permits requests to private IPv4 addresses to be smuggled via four classes of IPv6 transition encodings - 6to4 (2002::/16), NAT64 (64:ff9b::/96 and 64:ff9b:1::/48), Teredo (2001::/32), and IPv4-compatible (::/96) - none of which appeared in the IpUtils::PRIVATE_SUBNETS blocklist. Any Symfony application on versions 5.4.0-5.4.52 or 6.4.0-8.0.12 that uses NoPrivateNetworkHttpClient as its SSRF guard and accepts attacker-controlled URLs is vulnerable to the filter bypass; actual packet delivery to the embedded private IPv4 is additionally gated by the server's IPv6 routing configuration. No public exploit code has been released and this CVE is not in CISA KEV, but the bypass payloads are fully enumerated in the official security advisory.
An issue was discovered in Malwarebytes 4.x and 5.x (and Nebula 2020-10-21 and later). Rated medium severity (CVSS 6.2), this vulnerability is no authentication required, low attack complexity. No vendor patch available.
JIT miscompilation in Firefox's JavaScript engine exposes users to a denial-of-service condition when visiting attacker-controlled web content. The vulnerability stems from a type confusion flaw (CWE-843) in the JIT compiler component, where incorrect type assumptions during optimization can corrupt memory state and crash the browser. No active exploitation has been confirmed (no CISA KEV listing), EPSS stands at 0.02% (5th percentile), and vendor-released patch Firefox 151.0.3 is available per Mozilla advisory mfsa2026-54.
Cross-site scripting in Firefox for iOS Reader View allows unauthenticated remote attackers to inject arbitrary markup via maliciously crafted JSON-LD metadata on attacker-controlled pages. When a victim activates Reader View on such a page, injected HTML executes in the context of an internal Firefox origin, leaking sensitive URL parameters that can be leveraged to access internal pages and achieve arbitrary JavaScript execution with elevated browser-origin trust. Mozilla patched this in Firefox for iOS 151.2 per MFSA2026-53; no public exploit code and no CISA KEV listing have been identified at time of analysis.
Reader View in Firefox for iOS executes arbitrary JavaScript due to an incorrect template substitution order, enabling cross-site scripting via JSON-LD data injection. The flaw affects all Firefox for iOS versions prior to 151.2 running on Apple iOS devices; unauthenticated remote attackers can exploit this by luring users to a malicious page and having them activate Reader View, after which attacker-controlled placeholder strings embedded in the page's structured data are processed as executable script. No public exploit has been identified at time of analysis and the vulnerability is not listed in CISA KEV, but the low attack complexity and no-auth-required access vector (per CVSS PR:N) make it feasible for opportunistic campaigns targeting iOS Firefox users.
Local SSRF in PraisonAI's direct-prompt CLI allows an attacker who can influence prompt text to cause the operator's machine to fetch loopback and private-network HTTP resources, injecting the response body into the LLM prompt context. Affected packages are pip/praisonai <= 4.6.39 and pip/praisonaiagents <= 1.6.39; patches are available in 4.6.40 and 1.6.40 respectively. Publicly available exploit code exists (confirmed working PoC in the GHSA advisory), no public exploit identified at time of analysis as confirmed actively exploited (CISA KEV listing absent), and the CVSS 5.5 score reflects a meaningful confidentiality impact (C:H) constrained by a local attack vector.
Firefox for iOS misrepresents attacker-controlled domains as trusted origins through improper rendering of right-to-left Unicode characters and internationalized domain names (IDNs) in the link preview UI surface, enabling a spoofing/phishing attack against users on any iOS version prior to 151.1. The CVSS vector (PR:N/UI:R) indicates unauthenticated network-reachable exploitation contingent on user interaction with a crafted link. EPSS at the 5th percentile and SSVC exploitation status of 'none' confirm no active exploitation or public exploit code has been identified at time of analysis, positioning this as a targeted phishing risk rather than a broad automated threat.
Firefox for iOS Reader mode exposed an unauthenticated local HTTP server on the device, enabling a co-installed malicious application to request arbitrary URLs through that server and receive responses rendered with the authenticated user's session cookies. Affected versions are all Firefox for iOS releases prior to 151.0, confirmed by Mozilla Security Advisory MFSA2026-49. No public exploit code has been identified and CISA SSVC rates exploitation as none at time of analysis, but successful exploitation would allow silent exfiltration of authenticated web content from the victim's active browsing session.
Same-origin policy bypass in Firefox's Networking: JAR component (all versions prior to Firefox 151) allows unauthenticated remote attackers to cross origin boundaries, enabling limited reads from and writes to content belonging to other origins. The CVSS 6.5 Medium score reflects partial confidentiality and integrity impact without availability consequence. No public exploit has been identified and CISA SSVC reports no active exploitation, though the attack is classified as automatable, meaning scripted mass-targeting would be feasible if a POC were released.
Spoofing via the Form Autofill component in Mozilla Firefox allows a network-based attacker to achieve high integrity impact against users who interact with attacker-controlled content. The CVSS vector (AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N) confirms no authentication is required from the attacker side, but a victim must interact with malicious content for the attack to succeed. No public exploit code has been identified at time of analysis, and EPSS sits at 0.02% (5th percentile), indicating very low observed exploitation probability; the vulnerability is not listed in the CISA KEV catalog.
Toolbar component spoofing in Firefox for Android allows a remote unauthenticated attacker to mislead users about the origin or security state of a web page, achieving high integrity impact without confidentiality or availability consequences. The vulnerability affects Firefox for Android versions prior to 151 and is classified under CWE-290 (Authentication Bypass by Spoofing), meaning the Toolbar UI element can be manipulated to present false trust signals. No public exploit exists and no active exploitation has been confirmed; Mozilla released a fix in Firefox 151, and the advisory is published at mfsa2026-46.
Stored cross-site scripting in AVideo's Live plugin allows authenticated streamers to inject malicious JavaScript into live stream pages, executing in any visitor's browser context. The vulnerability exists in modeYoutubeLive.php where stream keys are rendered unescaped into HTML class attributes. Attackers with canStream privileges can persist event handlers via crafted stream keys that trigger when victims view the live page, enabling session hijacking, CSRF token theft, and potential admin account compromise. CVSS 5.4 reflects network-accessible exploitation requiring only low-privilege authentication and user interaction, with scope change indicating cross-user impact. No patch is currently available per GitHub advisory GHSA-m5j4-7r85-2cj2.
Open WebUI versions up to 0.8.8 expose admin-configured system prompts to authenticated regular (non-admin) users through the /api/models API endpoint, allowing information disclosure of sensitive model instructions and internal configuration details. The vulnerability requires valid user authentication but no administrative privileges, enabling any authenticated user to retrieve confidential system prompts via a simple HTTP GET request. This is confirmed actively exploited in production deployments with a publicly available proof-of-concept.
linux-entra-sso, Siemens' Chrome browser extension for Microsoft Entra ID SSO on Linux, leaks the Entra ID Primary Refresh Token (PRT) cookie to attacker-controlled hosts due to missing URL origin validation in its Chrome adapter. Versions prior to 1.8.1 are affected; the Chrome adapter's declarativeNetRequest rule uses an unanchored urlFilter that performs substring matching, causing the PRT injection to fire on any request URL containing 'https://login.microsoftonline.com/' anywhere in the path - not just requests actually destined for Microsoft's login endpoint. A proof-of-concept exists per SSVC data, though exploitation is not confirmed in CISA KEV and EPSS is very low (0.03%), reflecting the niche product footprint and required user interaction.
Information disclosure vulnerability in Firefox's JavaScript Engine allows remote unauthenticated attackers to leak sensitive memory contents over the network without user interaction. The vulnerability affects Firefox versions prior to 150.0.3 and has a low EPSS score (0.02%) despite the network-based attack vector, suggesting limited real-world exploitation pressure despite the modest CVSS score of 5.3.