CVE-2026-92007: Vulnerability in Mozilla Firefox
Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 140.16.
AI Analysis
Technical Summary
The vulnerability identified as CVE-2026-92007 involves incorrect boundary conditions in the Graphics: CanvasWebGL component of Mozilla Firefox, which leads to privilege escalation. This security flaw was discovered and reported by Mozilla and is part of a set of memory safety vulnerabilities fixed in Firefox 156 and corresponding ESR releases. The vendor advisories confirm that the issue has been resolved in Firefox 156 and ESR 115.41, 140.16, and 153.3. The vulnerability is classified as high impact due to the potential for privilege escalation.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to escalate privileges within the Firefox browser, potentially enabling actions that require higher permissions than intended. This could compromise the security context of the browser and affect user data or browser integrity. However, there are no reports of active exploitation in the wild.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 156 and Firefox ESR versions 115.41, 140.16, and 153.3. Users and administrators should update to these versions or later to remediate the issue. No additional mitigation actions are required beyond applying the official patches.
CVE-2026-92007: Vulnerability in Mozilla Firefox
Description
Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 140.16.
CVSS v3.1
Score 8.8high
Affected software
Mozilla
Firefox
Mozilla
Thunderbird
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability identified as CVE-2026-92007 involves incorrect boundary conditions in the Graphics: CanvasWebGL component of Mozilla Firefox, which leads to privilege escalation. This security flaw was discovered and reported by Mozilla and is part of a set of memory safety vulnerabilities fixed in Firefox 156 and corresponding ESR releases. The vendor advisories confirm that the issue has been resolved in Firefox 156 and ESR 115.41, 140.16, and 153.3. The vulnerability is classified as high impact due to the potential for privilege escalation.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to escalate privileges within the Firefox browser, potentially enabling actions that require higher permissions than intended. This could compromise the security context of the browser and affect user data or browser integrity. However, there are no reports of active exploitation in the wild.
Mitigation Recommendations
Mozilla has released official fixes for this vulnerability in Firefox 156 and Firefox ESR versions 115.41, 140.16, and 153.3. Users and administrators should update to these versions or later to remediate the issue. No additional mitigation actions are required beyond applying the official patches.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-09-15T12:33:26.131Z
- State
- PUBLISHED
- Vendor Advisory Urls
- [{"url":"https://www.mozilla.org/security/advisories/mfsa2026-90/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-91/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-92/","vendor":"Mozilla"},{"url":"https://www.mozilla.org/security/advisories/mfsa2026-93/","vendor":"Mozilla"}]
Threat ID: 6aa93e5e55bf5e2cf5d30fc7
Added to database: 09/15/2026, 12:47:26 UTC
Last enriched: 09/15/2026, 13:46:35 UTC
Last updated: 09/15/2026, 20:18:04 UTC
Views: 2
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.