CVE-2026-92013: 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
CVE-2026-92013 is a security vulnerability in Mozilla Firefox affecting the Graphics: CanvasWebGL component. The issue arises from incorrect boundary conditions that lead to privilege escalation. This vulnerability was reported and addressed by Mozilla, with patches released in Firefox 156 and ESR versions 115.41, 140.16, and 153.3. The Mozilla advisories classify the impact as high and provide references to the underlying bug report (Bug 2058078).
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to escalate privileges within the Firefox browser, potentially enabling actions beyond the normal security restrictions of the user context. The impact is rated high by Mozilla, indicating significant risk if unpatched.
Mitigation Recommendations
Mozilla has released official patches fixing this vulnerability in Firefox 156 and Firefox ESR 115.41, 140.16, and 153.3. Users and administrators should update affected Firefox installations to these versions or later to remediate the issue. No additional mitigation steps are required beyond applying the official updates.
CVE-2026-92013: 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
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-92013 is a security vulnerability in Mozilla Firefox affecting the Graphics: CanvasWebGL component. The issue arises from incorrect boundary conditions that lead to privilege escalation. This vulnerability was reported and addressed by Mozilla, with patches released in Firefox 156 and ESR versions 115.41, 140.16, and 153.3. The Mozilla advisories classify the impact as high and provide references to the underlying bug report (Bug 2058078).
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to escalate privileges within the Firefox browser, potentially enabling actions beyond the normal security restrictions of the user context. The impact is rated high by Mozilla, indicating significant risk if unpatched.
Mitigation Recommendations
Mozilla has released official patches fixing this vulnerability in Firefox 156 and Firefox ESR 115.41, 140.16, and 153.3. Users and administrators should update affected Firefox installations to these versions or later to remediate the issue. No additional mitigation steps are required beyond applying the official updates.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-09-15T12:33:32.436Z
- 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: 6aa93e5e55bf5e2cf5d30fcd
Added to database: 09/15/2026, 12:47:26 UTC
Last enriched: 09/15/2026, 13:32:57 UTC
Last updated: 09/16/2026, 03:18:34 UTC
Views: 4
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