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Mozilla Firefox EUVDEUVD-2026-60665

| CVE-2026-74969 HIGH
Exposure of Private Personal Information to an Unauthorized Actor (CWE-359)
2026-08-18 mozilla GHSA-2gp7-2525-93fm
Information Disclosure Mozilla Red Hat Suse
8.8
CVSS 3.1 · Vendor: mozilla
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Severity by source

Vendor (mozilla) PRIMARY
8.8 HIGH
AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
vuln.today AI
8.8 HIGH

Network-delivered via web content, no privileges needed, user must visit page, scope unchanged by browser sandbox; full triad impact consistent with UAF in layout engine.

3.1 AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
4.0 AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
SUSE
HIGH
qualitative
Red Hat
6.1 MEDIUM
qualitative

Primary rating from Vendor (mozilla).

CVSS VectorVendor: mozilla

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

4
Analysis Generated
Aug 19, 2026 - 13:33 vuln.today
CVSS changed
Aug 19, 2026 - 13:22 NVD
8.8 (HIGH)
CVE Published
Aug 18, 2026 - 12:23 cve.org
HIGH 8.8
CVE Published
Aug 18, 2026 - 12:23 cve.org
UNKNOWN (no severity yet)

DescriptionCVE.org

Use-after-free in the Layout: Text and Fonts component. This vulnerability was fixed in Firefox 154, Firefox ESR 115.39, Firefox ESR 140.14, and Firefox ESR 153.1.

AnalysisAI

Use-after-free memory corruption in Firefox's Layout: Text and Fonts component allows a remote unauthenticated attacker to achieve high-confidence confidentiality, integrity, and availability impact by luring a user to visit a malicious web page. The vulnerability spans the main Firefox release channel and all three active ESR branches (115.x, 140.x, 153.x), indicating broad exposure across enterprise and consumer deployments. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access
Attacker hosts crafted HTML/font payload
Delivery
Victim visits malicious page via phishing or drive-by
Exploit
Firefox layout engine parses text/font resources
Execution
Use-after-free triggered during reflow
Persist
Heap memory corrupted via dangling pointer
Impact
Arbitrary code execution in renderer process
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Vulnerability AssessmentAI

Exploitation Exploitation requires the victim to load attacker-controlled web content in an unpatched version of Firefox - this is achievable via a drive-by visit to a malicious or compromised website, a phishing link, or a malicious advertisement on a legitimate site. … Additional conditions and limiting factors are described in the full assessment.
Risk Assessment The CVSS 3.1 base score of 8.8 (High) reflects a network-exploitable, low-complexity, unauthenticated vector requiring only user interaction - consistent with a drive-by browser exploit. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in.
Exploit Scenario An attacker hosts a web page embedding a specially crafted HTML document with malformed text or font resources designed to trigger a use-after-free condition in Firefox's layout engine during document reflow. A victim user visits the page - via a phishing link, malicious advertisement, or compromised website - and the browser processes the crafted content, freeing a layout object while a dangling pointer remains live. …
Remediation The primary remediation is to upgrade to a fixed release: Firefox 154 for main-channel users, Firefox ESR 115.39 for organizations on the long-term 115.x ESR branch, Firefox ESR 140.14 for 140.x ESR deployments, or Firefox ESR 153.1 for 153.x ESR deployments. … Detailed patch versions, workarounds, and compensating controls in full report.
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Recommended ActionAI

Within 24 hours, conduct an immediate inventory of Firefox deployments and versions across all organization-managed and BYOD devices using MDM, EDR, or inventory management tools; simultaneously escalate findings to security leadership and prepare user communication. …

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Vendor StatusVendor

SUSE

Severity: Important
Product Status
Container suse/kiosk/firefox-esr:140.14-75.12 Affected
SUSE Linux Enterprise Desktop 15 SP7 SUSE Linux Enterprise High Performance Computing 15 SP7 SUSE Linux Enterprise Module for Desktop Applications 15 SP7 SUSE Linux Enterprise Server 15 SP7 SUSE Linux Enterprise Server for SAP Applications 15 SP7 Fixed
SUSE Linux Enterprise High Performance Computing 15 SP4-ESPOS Fixed
SUSE Linux Enterprise High Performance Computing 15 SP4-LTSS Fixed
SUSE Linux Enterprise High Performance Computing 15 SP5-ESPOS Fixed

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EUVD-2026-60665 vulnerability details – vuln.today
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