CVE-2026-92009: 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, and Firefox ESR 153.3.
AI Analysis
Technical Summary
The vulnerability identified as CVE-2026-92009 involves incorrect boundary conditions in the Graphics: CanvasWebGL component of Mozilla Firefox, leading to privilege escalation. This flaw was reported and fixed by Mozilla in Firefox 156 and ESR releases 115.41, 140.16, and 153.3. The Mozilla advisories classify this vulnerability as high impact and include references to the specific bug report (Bug 2058066). Multiple related vulnerabilities affecting the Graphics: CanvasWebGL component were also addressed simultaneously. No CVSS score is provided for this vulnerability.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to escalate privileges within the Firefox browser, potentially leading to unauthorized actions or access to restricted browser functions. The impact is rated high by Mozilla. There are no known exploits in the wild at the time of publication.
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 steps are indicated by the vendor advisories.
CVE-2026-92009: 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, and Firefox ESR 153.3.
Affected software
Mozilla
Firefox
pkg:github/mozilla/firefox-esrRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability identified as CVE-2026-92009 involves incorrect boundary conditions in the Graphics: CanvasWebGL component of Mozilla Firefox, leading to privilege escalation. This flaw was reported and fixed by Mozilla in Firefox 156 and ESR releases 115.41, 140.16, and 153.3. The Mozilla advisories classify this vulnerability as high impact and include references to the specific bug report (Bug 2058066). Multiple related vulnerabilities affecting the Graphics: CanvasWebGL component were also addressed simultaneously. No CVSS score is provided for this vulnerability.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to escalate privileges within the Firefox browser, potentially leading to unauthorized actions or access to restricted browser functions. The impact is rated high by Mozilla. There are no known exploits in the wild at the time of publication.
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 steps are indicated by the vendor advisories.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- mozilla
- Date Reserved
- 2026-09-15T12:33:28.205Z
- 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: 6aa93e5e55bf5e2cf5d30fc9
Added to database: 09/15/2026, 12:47:26 UTC
Last enriched: 09/15/2026, 13:33:14 UTC
Last updated: 09/15/2026, 14:41:35 UTC
Views: 3
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