Mozjs52: Incorrect boundary conditions in the SVG component. (CVE-2026-109762)
Description
CVE-2026-109762 is a vulnerability involving incorrect boundary conditions in the SVG component of mozjs52. This flaw was addressed and fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5. The vulnerability has a high CVSS score of 8.8, indicating a serious security impact. It allows for potential high impact on confidentiality, integrity, and availability. Multiple specific affected versions of mozjs52 are identified. 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-2026-109762) concerns incorrect boundary conditions in the SVG component of mozjs52, which could lead to significant security issues. The flaw was fixed in Firefox 158 and corresponding ESR and Thunderbird versions. 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 network attack vector, low attack complexity, no privileges required, user interaction required, unchanged scope, and high impact on confidentiality, integrity, and availability. The vendor advisory confirms the fix in Firefox 158 and related products. Numerous specific vulnerable versions of mozjs52 are listed, primarily older builds prior to the fixed versions.
Potential Impact
The vulnerability allows an attacker to potentially cause high impact on confidentiality, integrity, and availability of the affected software. Given the CVSS score of 8.8, exploitation could lead to significant compromise of the affected system. However, no known exploits in the wild have been reported to date.
Mitigation Recommendations
A fix is available and has been officially released in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5. Users and administrators should update to these fixed versions or later to remediate this vulnerability. No additional mitigation steps are indicated by the vendor advisory.
Technical Details
- Gcve Source
- db.gcve.eu
- Osv Id
- UBUNTU-CVE-2026-109762
- 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: 6ada44ff4d27ba8daa6a5ade
Added to database: 10/22/2026, 17:16:47 UTC
Last enriched: 10/22/2026, 17:37:28 UTC
Last updated: 10/22/2026, 17:37:28 UTC
Views: 2
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