Mozilla

Use-after-free in the WebRTC: Audio/Video component. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Same-origin policy bypass in the DOM: Workers component. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Mitigation bypass in the DOM: Security component. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Same-origin policy bypass in the DOM: Notifications component. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Incorrect boundary conditions in the JavaScript: WebAssembly component. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.

Spoofing issue in Firefox. Rated low severity (CVSS 3.4), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.

Use-after-free in the Audio/Video component. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Mitigation bypass in the DOM: Core & HTML component. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Race condition in the Graphics component. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.

JIT miscompilation in the JavaScript Engine: JIT component. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Sandbox escape due to integer overflow in the Graphics: Canvas2D component. Rated high severity (CVSS 8.6), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Cookie storage for non-HTML temporary documents was being shared incorrectly with normal browsing content, allowing information from private tabs to escape Incognito mode even after the user closed. Rated medium severity (CVSS 4.0), this vulnerability is no authentication required, low attack complexity. No vendor patch available.

Memory safety bugs present in Firefox ESR 140.2, Thunderbird ESR 140.2, Firefox 142 and Thunderbird 142. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Information disclosure in the Networking: Cache component. Rated medium severity (CVSS 6.2), this vulnerability is no authentication required, low attack complexity. No vendor patch available.

Information disclosure, mitigation bypass in the Privacy component in Firefox for Android. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Spoofing issue in the Site Permissions component. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Integer overflow in the SVG component. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

Incorrect boundary conditions in the JavaScript: GC component. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Mitigation bypass in the Web Compatibility: Tooling component. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Spoofing issue in the WebAuthn component in Firefox for Android. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Same-origin policy bypass in the Layout component. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Sandbox escape due to undefined behavior, invalid pointer in the Graphics: Canvas2D component. Rated high severity (CVSS 7.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Sandbox escape due to use-after-free in the Graphics: Canvas2D component. Rated high severity (CVSS 7.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Memory safety bugs present in Firefox 141 and Thunderbird 141. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Spoofing issue in the Address Bar component of Firefox Focus for Android. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Memory safety bugs present in Firefox ESR 115.26, Firefox ESR 128.13, Thunderbird ESR 128.13, Firefox ESR 140.1, Thunderbird ESR 140.1, Firefox 141 and Thunderbird 141. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.

Memory safety bugs present in Firefox ESR 140.1, Thunderbird ESR 140.1, Firefox 141 and Thunderbird 141. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.

Spoofing issue in the Address Bar component. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Denial-of-service due to out-of-memory in the Graphics: WebRender component. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Uninitialized memory in the JavaScript Engine component. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Same-origin policy bypass in the Graphics: Canvas2D component. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

An attacker was able to perform memory corruption in the GMP process which processes encrypted media. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

A crafted URL using a blob: URI could have hidden the true origin of the page, resulting in a potential spoofing attack. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Firefox for Android allowed a sandboxed iframe without the `allow-downloads` attribute to start downloads. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

In the address bar, Firefox for Android truncated the display of URLs from the end instead of prioritizing the origin. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Malicious pages could use Firefox for iOS to pass FIDO: links to the OS and trigger the hybrid passkey transport. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Firefox for iOS would not respect a Content-Disposition header of type Attachment and would incorrectly display the content inline rather than downloading, potentially allowing for XSS attacks This. Rated medium severity (CVSS 6.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Malicious scripts could bypass the popup blocker to spam new tabs, potentially resulting in denial of service attacks This vulnerability affects Firefox for iOS < 142. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Malicious scripts utilizing repetitive JavaScript alerts could prevent client user interaction in some scenarios and allow for denial of service attacks This vulnerability affects Firefox for iOS <. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

The QR scanner could allow arbitrary websites to be opened if a user was tricked into scanning a malicious link that leveraged Firefox's open-text URL scheme This vulnerability affects Firefox for. Rated critical severity (CVSS 9.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

The URL scheme used by Firefox to facilitate searching of text queries could incorrectly allow attackers to open arbitrary website URLs or internal pages if a user was tricked into clicking a link. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Sandboxed iframes on webpages could potentially allow downloads to the device, bypassing the expected sandbox restrictions declared on the parent page This vulnerability affects Firefox for iOS < 141. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

An XSS vulnerability exists in langgenius/dify versions prior to 1.1.3, specifically affecting Firefox browsers. This vulnerability allows an attacker to obtain the administrator's token by sending a payload in the published chat. When the administrator views the conversation content through the monitoring/log function using Firefox, the XSS vulnerability is triggered, potentially exposing sensitive token information to the attacker.

Improper Input Validation vulnerability in Mozilla neqo leads to an unexploitable crash..This issue affects neqo: from 0.4.24 through 0.13.2.

CVE-2025-6436 is a collection of memory safety vulnerabilities in Firefox and Thunderbird versions 139 that demonstrate evidence of memory corruption with potential for arbitrary code execution. The vulnerability affects Firefox < 140 and Thunderbird < 140, and requires network access but moderate attack complexity. While no active exploitation in the wild has been confirmed, the high CVSS score of 8.1 and memory corruption evidence indicate this is a critical patch requiring immediate deployment.

CVE-2025-6435 is a file handling vulnerability in Firefox and Thunderbird's Developer Tools where saved network responses may lack the `.download` file extension, potentially allowing attackers to trick users into executing malicious executables. This affects Firefox versions below 140 and Thunderbird versions below 140. The vulnerability requires user interaction (saving and executing a file) but carries high severity (CVSS 8.1) due to potential for arbitrary code execution.

The exception page for the HTTPS-Only feature, displayed when a website is opened via HTTP, lacked an anti-clickjacking delay, potentially allowing an attacker to trick a user into granting an exception and loading a webpage over HTTP. This vulnerability affects Firefox < 140 and Thunderbird < 140.

CVE-2025-6433 is a critical WebAuthn specification violation in Firefox and Thunderbird that allows attackers to present WebAuthn authentication challenges over non-secure TLS connections with user-granted exceptions. This bypasses the WebAuthn requirement for secure transport without errors, enabling credential theft and account compromise. Firefox < 140 and Thunderbird < 140 are affected; the network-based attack requires no privileges or user interaction beyond the initial certificate exception grant, resulting in a CVSS 9.8 critical rating.

CVE-2025-6432 is a DNS proxy bypass vulnerability in Firefox and Thunderbird when Mozilla's Multi-Account Containers extension is enabled. Under specific conditions-invalid domain names or unresponsive SOCKS proxies-DNS requests circumvent the configured SOCKS proxy, potentially exposing user browsing activity to network monitoring. This affects Firefox < 140 and Thunderbird < 140, has a high CVSS score of 8.6 reflecting significant confidentiality impact, and requires network-level access but no user interaction to exploit.

When a link can be opened in an external application, Firefox for Android will, by default, prompt the user before doing so. An attacker could have bypassed this prompt, potentially exposing the user to security vulnerabilities or privacy leaks in external applications. *This bug only affects Firefox for Android. Other versions of Firefox are unaffected.* This vulnerability affects Firefox < 140.

When a file download is specified via the `Content-Disposition` header, that directive would be ignored if the file was included via a `&lt;embed&gt;` or `&lt;object&gt;` tag, potentially making a website vulnerable to a cross-site scripting attack. This vulnerability affects Firefox < 140, Firefox ESR < 128.12, Thunderbird < 140, and Thunderbird < 128.12.

Firefox could have incorrectly parsed a URL and rewritten it to the youtube.com domain when parsing the URL specified in an `embed` tag. This could have bypassed website security checks that restricted which domains users were allowed to embed. This vulnerability affects Firefox < 140, Firefox ESR < 128.12, Thunderbird < 140, and Thunderbird < 128.12.

When a URL was provided in a link querystring parameter, Firefox for Android would follow that URL instead of the correct URL, potentially leading to phishing attacks. *This bug only affects Firefox for Android. Other versions of Firefox are unaffected.* This vulnerability affects Firefox < 140.

A security vulnerability in Devtools. This vulnerability affects Firefox (CVSS 9.1). Critical severity with potential for significant impact on affected systems.

CVE-2025-6426 is a missing executable file warning vulnerability in Firefox and Thunderbird on macOS that fails to alert users before opening files with the 'terminal' extension, potentially allowing attackers to execute arbitrary code. This affects Firefox < 140, Firefox ESR < 128.12, Thunderbird < 140, and Thunderbird < 128.12 on macOS only. An attacker can leverage this to trick users into executing malicious terminal scripts by bypassing the security warning mechanism that normally prevents automatic execution of executable files.

An attacker who enumerated resources from the WebCompat extension could have obtained a persistent UUID that identified the browser, and persisted between containers and normal/private browsing mode, but not profiles. This vulnerability affects Firefox < 140, Firefox ESR < 115.25, Firefox ESR < 128.12, Thunderbird < 140, and Thunderbird < 128.12.

A denial of service vulnerability (CVSS 9.8). Critical severity with potential for significant impact on affected systems.

A crafted HTML email using mailbox:/// links can trigger automatic, unsolicited downloads of .pdf files to the user's desktop or home directory without prompting, even if auto-saving is disabled. This behavior can be abused to fill the disk with garbage data (e.g. using /dev/urandom on Linux) or to leak Windows credentials via SMB links when the email is viewed in HTML mode. While user interaction is required to download the .pdf file, visual obfuscation can conceal the download trigger. Viewing the email in HTML mode is enough to load external content. This vulnerability affects Thunderbird < 128.11.1 and Thunderbird < 139.0.2.

Local privilege escalation vulnerability in Mozilla VPN for macOS that allows an authenticated local user to escalate privileges from normal user to root. This affects Mozilla VPN versions below 2.28.0 on macOS exclusively. An attacker with local access can exploit this without user interaction to gain complete system control, making it a critical risk for multi-user systems or compromised local accounts.

An integer overflow vulnerability exists in the OrderedHashTable component of Firefox's JavaScript engine, allowing remote attackers to achieve arbitrary code execution without requiring user interaction or elevated privileges. This critical flaw affects Firefox versions prior to 139.0.4 and carries a maximum CVSS score of 9.8, indicating severe real-world risk with network-based attack vectors requiring no user interaction.

Critical memory corruption vulnerability in Firefox canvas operations that allows unauthenticated remote attackers to achieve arbitrary code execution with no user interaction required. Firefox versions prior to 139.0.4 are affected. The vulnerability has a near-perfect CVSS score of 9.8 due to network accessibility, low attack complexity, and complete compromise of confidentiality, integrity, and availability.

Memory safety bugs present in Firefox 138 and Thunderbird 138. Rated high severity (CVSS 7.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Previewing a response in Devtools ignored CSP headers, which could have allowed content injection attacks. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

In certain cases, SNI could have been sent unencrypted even when encrypted DNS was enabled. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Memory safety bug present in Firefox ESR 128.10, and Thunderbird 128.10. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.

Memory safety bugs present in Firefox 138, Thunderbird 138, Firefox ESR 128.10, and Thunderbird 128.10. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.

A clickjacking vulnerability could have been used to trick a user into leaking saved payment card details to a malicious page. Rated medium severity (CVSS 5.4), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Script elements loading cross-origin resources generated load and error events which leaked information enabling XS-Leaks attacks. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Due to insufficient escaping of the ampersand character in the “Copy as cURL” feature, an attacker could trick a user into using this command, potentially leading to local code execution on the. Rated medium severity (CVSS 4.8), this vulnerability is low attack complexity. No vendor patch available.

Due to insufficient escaping of the newline character in the “Copy as cURL” feature, an attacker could trick a user into using this command, potentially leading to local code execution on the user's. Rated medium severity (CVSS 4.8), this vulnerability is low attack complexity. No vendor patch available.

Error handling for script execution was incorrectly isolated from web content, which could have allowed cross-origin leak attacks. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

A double-free could have occurred in `vpx_codec_enc_init_multi` after a failed allocation when initializing the encoder for WebRTC. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Opening maliciously-crafted URLs in Firefox from other apps such as Safari could have allowed attackers to spoof website addresses if the URLs utilized non-HTTP schemes used internally by the Firefox. Rated medium severity (CVSS 4.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

An attacker was able to perform an out-of-bounds read or write on a JavaScript object by confusing array index sizes. Rated high severity (CVSS 8.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

An attacker was able to perform an out-of-bounds read or write on a JavaScript `Promise` object. Rated critical severity (CVSS 9.8), this vulnerability is remotely exploitable, no authentication required, low attack complexity. Public exploit code available and no vendor patch available.

Open redirection vulnerability in IceWarp Mail Server affecting version 11.4.0. Rated medium severity (CVSS 5.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

It was possible to craft an email that showed a tracking link as an attachment. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Thunderbird's handling of the X-Mozilla-External-Attachment-URL header can be exploited to execute JavaScript in the file:/// context. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Thunderbird parses addresses in a way that can allow sender spoofing in case the server allows an invalid From address to be used. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Memory safety bug present in Firefox ESR 128.9, and Thunderbird 128.9. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.

Memory safety bugs present in Firefox 137 and Thunderbird 137. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Memory safety bugs present in Firefox 137, Thunderbird 137, Firefox ESR 128.9, and Thunderbird 128.9. Rated high severity (CVSS 8.1), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.

A vulnerability existed in Thunderbird for Android where potentially sensitive library locations were logged via Logcat. Rated medium severity (CVSS 5.3), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

Due to insufficient escaping of special characters in the "copy as cURL" feature, an attacker could trick a user into using this command, potentially leading to local code execution on the user's. Rated medium severity (CVSS 5.1), this vulnerability is no authentication required, low attack complexity. No vendor patch available.

A security vulnerability in Thunderbird allowed malicious sites to use redirects to send credentialed requests to arbitrary endpoints on any site that had invoked the Storage Access API. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

A vulnerability was identified in Thunderbird where XPath parsing could trigger undefined behavior due to missing null checks during attribute access. Rated medium severity (CVSS 4.8), this vulnerability is remotely exploitable, no authentication required. No vendor patch available.

A specially crafted filename containing a large number of encoded newline characters could obscure the file's extension when displayed in the download dialog. Rated medium severity (CVSS 6.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.

An attacker with control over a content process could potentially leverage the privileged UITour actor to leak sensitive information or escalate privileges. Rated high severity (CVSS 7.1), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

Due to insufficient escaping of the special characters in the "copy as cURL" feature, an attacker could trick a user into using this command, potentially leading to local code execution on the user's. Rated medium severity (CVSS 5.7), this vulnerability is remotely exploitable, low attack complexity. No vendor patch available.

A process isolation vulnerability in Thunderbird stemmed from improper handling of javascript: URIs, which could allow content to execute in the top-level document's process instead of the intended. Rated critical severity (CVSS 9.1), this vulnerability is remotely exploitable, no authentication required, low attack complexity. No vendor patch available.