Mozjs52: Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component. (CVE-2026-92012)
CVE-2026-92012 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 and a CVSS score of 8.8. Multiple specific versions of mozjs52 are affected. No known exploits in the wild have been reported.
AI Analysis
Technical Summary
This vulnerability involves incorrect boundary conditions in the Graphics: CanvasWebGL component of mozjs52, which can lead to privilege escalation. It affects multiple versions of mozjs52 as listed, and was addressed by Mozilla in Firefox 156, Firefox ESR 115.41, 140.16, 153.3, and Thunderbird versions 156, 140.16, and 153.3. The CVSS 3.1 base score is 8.8, indicating a high severity with network attack vector, low attack complexity, no privileges required, user interaction required, and high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to escalate privileges within the affected application environment, potentially leading to full compromise of the affected software's security context. The CVSS score of 8.8 reflects a high impact on confidentiality, integrity, and availability.
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 to these fixed versions or later to remediate the issue. No additional mitigation steps are indicated by the vendor advisory.
Mozjs52: Privilege escalation due to incorrect boundary conditions in the Graphics: CanvasWebGL component. (CVE-2026-92012)
Description
CVE-2026-92012 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 and a CVSS score of 8.8. Multiple specific versions of mozjs52 are affected. 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 involves incorrect boundary conditions in the Graphics: CanvasWebGL component of mozjs52, which can lead to privilege escalation. It affects multiple versions of mozjs52 as listed, and was addressed by Mozilla in Firefox 156, Firefox ESR 115.41, 140.16, 153.3, and Thunderbird versions 156, 140.16, and 153.3. The CVSS 3.1 base score is 8.8, indicating a high severity with network attack vector, low attack complexity, no privileges required, user interaction required, and high impact on confidentiality, integrity, and availability.
Potential Impact
Successful exploitation of this vulnerability could allow an attacker to escalate privileges within the affected application environment, potentially leading to full compromise of the affected software's security context. The CVSS score of 8.8 reflects a high impact on confidentiality, integrity, and availability.
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 to these fixed versions or later to remediate the issue. No additional mitigation steps are indicated by the vendor advisory.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-92012
- 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: 6ab4be40f7a7c54106efce09
Added to database: 09/24/2026, 06:08:00 UTC
Last enriched: 09/24/2026, 06:35:42 UTC
Last updated: 09/25/2026, 01:47:46 UTC
Views: 3
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