Mozjs52: Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component. (CVE-2026-92009)
CVE-2026-92009 is a privilege escalation vulnerability in the Graphics: CanvasWebGL component of mozjs52. It arises from incorrect boundary conditions and was fixed in Firefox 156 and corresponding ESR and Thunderbird versions. The vulnerability has a high impact with a CVSS score of 8.8, indicating potential for significant confidentiality, integrity, and availability impact. Multiple specific vulnerable versions are identified, primarily various builds of mozjs52 and related Firefox and Thunderbird versions. No known exploits in the wild have been reported.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-92009) involves privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component of mozjs52. It affects multiple specific versions of mozjs52 and related Firefox and Thunderbird builds. The issue was addressed and fixed in Firefox 156, Firefox ESR 115.41, 140.16, 153.3, and Thunderbird 156, 140.16, and 153.3. The CVSS 3.1 score is 8.8 (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H), indicating a high-severity vulnerability exploitable remotely with user interaction and no privileges required.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to escalate privileges, potentially gaining higher-level access than intended. The CVSS score of 8.8 reflects high impact on confidentiality, integrity, and availability. However, there are no known exploits in the wild at this time.
Mitigation Recommendations
This vulnerability has been fixed in Firefox 156, Firefox ESR 115.41, 140.16, 153.3, Thunderbird 156, 140.16, and 153.3. Users and administrators should update affected software to these fixed versions or later to mitigate the risk. No additional mitigation steps are indicated by the vendor advisory.
Mozjs52: Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component. (CVE-2026-92009)
Description
CVE-2026-92009 is a privilege escalation vulnerability in the Graphics: CanvasWebGL component of mozjs52. It arises from incorrect boundary conditions and was fixed in Firefox 156 and corresponding ESR and Thunderbird versions. The vulnerability has a high impact with a CVSS score of 8.8, indicating potential for significant confidentiality, integrity, and availability impact. Multiple specific vulnerable versions are identified, primarily various builds of mozjs52 and related Firefox and Thunderbird versions. No known exploits in the wild have been reported.
CVSS v3.1
Score 8.8high
Affected software
pkg:deb/ubuntu/mozjs52?arch=source&distro=bionicpkg:deb/ubuntu/mozjs38?arch=source&distro=bionicpkg:deb/ubuntu/mozjs68?arch=source&distro=focalpkg:deb/ubuntu/mozjs52?arch=source&distro=focalpkg:deb/ubuntu/mozjs102?arch=source&distro=jammypkg:deb/ubuntu/mozjs78?arch=source&distro=jammypkg:deb/ubuntu/mozjs91?arch=source&distro=jammypkg:deb/ubuntu/thunderbird?arch=source&distro=jammypkg:deb/ubuntu/mozjs102?arch=source&distro=noblepkg:deb/ubuntu/mozjs115?arch=source&distro=nobleRun 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
This vulnerability (CVE-2026-92009) involves privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component of mozjs52. It affects multiple specific versions of mozjs52 and related Firefox and Thunderbird builds. The issue was addressed and fixed in Firefox 156, Firefox ESR 115.41, 140.16, 153.3, and Thunderbird 156, 140.16, and 153.3. The CVSS 3.1 score is 8.8 (AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H), indicating a high-severity vulnerability exploitable remotely with user interaction and no privileges required.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to escalate privileges, potentially gaining higher-level access than intended. The CVSS score of 8.8 reflects high impact on confidentiality, integrity, and availability. However, there are no known exploits in the wild at this time.
Mitigation Recommendations
This vulnerability has been fixed in Firefox 156, Firefox ESR 115.41, 140.16, 153.3, Thunderbird 156, 140.16, and 153.3. Users and administrators should update affected software to these fixed versions or later to mitigate the risk. No additional mitigation steps are indicated by the vendor advisory.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-92009
- Osv Schema Version
- 1.7.0
- Ecosystems
- ["Ubuntu:18.04:LTS","Ubuntu:20.04:LTS","Ubuntu:22.04:LTS","Ubuntu:24.04:LTS"]
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6ab4be40f7a7c54106efced5
Added to database: 09/24/2026, 06:08:00 UTC
Last enriched: 09/24/2026, 06:36:29 UTC
Last updated: 09/24/2026, 06:36:29 UTC
Views: 2
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