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Mozjs52: Incorrect boundary conditions in the Graphics: Canvas2D component. (CVE-2026-109731)

0
Medium
VulnerabilityCVE-2026-109731gcveosvubuntu-cve-2026-109731cve-2026-109731ubuntu-18-04-ltsubuntu-20-04-ltsubuntu-22-04-ltsubuntu-24-04-lts
Published: 10/15/2026 (10/15/2026, 00:00:00 UTC)
Source: GCVE Database
Product: mozjs52

Description

CVE-2026-109731 is a medium severity vulnerability involving incorrect boundary conditions in the Graphics: Canvas2D component of mozjs52. This flaw was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5. The vulnerability could potentially lead to limited confidentiality and integrity impacts but does not affect availability. No known exploits are reported in the wild.

CVSS v3.1

Score 5.4medium

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
None
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Affected software

Ubuntu:18.04:LTSmore threats →ghsa
mozjs52
pkg:deb/ubuntu/mozjs52?arch=source&distro=bionic
Affected versions
=52.3.1-0ubuntu3=52.3.1-7fakesync1=52.8.1-0ubuntu0.18.04.1=52.9.1-0ubuntu0.18.04.1
Ubuntu:18.04:LTSmore threats →ghsa
mozjs38
pkg:deb/ubuntu/mozjs38?arch=source&distro=bionic
Affected versions
=38.8.0~repack1-0ubuntu1=38.8.0~repack1-0ubuntu3=38.8.0~repack1-0ubuntu4
Ubuntu:20.04:LTSmore threats →ghsa
mozjs68
pkg:deb/ubuntu/mozjs68?arch=source&distro=focal
Affected versions
=68.5.0-1~fakesync=68.5.0-2~fakesync=68.6.0-1=68.6.0-1ubuntu1
Ubuntu:20.04:LTSmore threats →ghsa
mozjs52
pkg:deb/ubuntu/mozjs52?arch=source&distro=focal
Affected versions
=52.9.1-1build1=52.9.1-1ubuntu3
Ubuntu:22.04:LTSmore threats →ghsa
mozjs102
pkg:deb/ubuntu/mozjs102?arch=source&distro=jammy
Affected versions
=102.11.0-0ubuntu0.22.04.1=102.12.0-0ubuntu0.22.04.1=102.13.0-0ubuntu0.22.04.1=102.15.1-0ubuntu0.22.04.1
Ubuntu:22.04:LTSmore threats →ghsa
mozjs78
pkg:deb/ubuntu/mozjs78?arch=source&distro=jammy
Affected versions
=78.13.0-1=78.15.0-2=78.15.0-4ubuntu1
Ubuntu:22.04:LTSmore threats →ghsa
mozjs91
pkg:deb/ubuntu/mozjs91?arch=source&distro=jammy
Affected versions
=91.5.1-0ubuntu1=91.6.0-1=91.6.0-2=91.7.0-2=91.10.0-0ubuntu1
Ubuntu:22.04:LTSmore threats →ghsa
thunderbird
pkg:deb/ubuntu/thunderbird?arch=source&distro=jammy
Affected versions
=1:91.1.2+build1-0ubuntu1=1:91.3.0+build2-0ubuntu1=1:91.3.1+build1-0ubuntu1=1:91.3.2+build1-0ubuntu1=1:91.4.0+build1.1-0ubuntu1=1:91.4.0+build2-0ubuntu1=1:91.5.0+build1-0ubuntu1=1:91.5.1+build1-0ubuntu1=1:91.6.1+build1-0ubuntu1=1:91.7.0+build1-0ubuntu1=1:91.7.0+build2-0ubuntu1=1:91.8.0+build2-0ubuntu1=1:91.9.1+build1-0ubuntu0.22.04.1=1:91.11.0+build2-0ubuntu0.22.04.1=1:102.2.2+build1-0ubuntu0.22.04.1=1:102.4.2+build2-0ubuntu0.22.04.1=1:102.7.1+build2-0ubuntu0.22.04.1=1:102.8.0+build2-0ubuntu0.22.04.1=1:102.9.0+build1-0ubuntu0.22.04.1=1:102.10.0+build2-0ubuntu0.22.04.1=1:102.11.0+build1-0ubuntu0.22.04.1=1:102.13.0+build1-0ubuntu0.22.04.1=1:102.15.0+build1-0ubuntu0.22.04.1=1:102.15.1+build1-0ubuntu0.22.04.1=1:115.3.1+build1-0ubuntu0.22.04.2=1:115.4.1+build1-0ubuntu0.22.04.1=1:115.5.0+build1-0ubuntu0.22.04.1=1:115.6.0+build2-0ubuntu0.22.04.1=1:115.8.1+build1-0ubuntu0.22.04.1=1:115.9.0+build1-0ubuntu0.22.04.1=1:115.10.1+build1-0ubuntu0.22.04.1=1:115.11.0+build2-0ubuntu0.22.04.1=1:115.12.0+build3-0ubuntu0.22.04.1=1:115.13.0+build5-0ubuntu0.22.04.1=1:115.15.0+build1-0ubuntu0.22.04.1=1:115.16.0+build2-0ubuntu0.22.04.1=1:115.18.0+build1-0ubuntu0.22.04.1=1:128.12.0+build1-0ubuntu0.22.04.1=1:140.7.1+build1-0ubuntu0.22.04.1
Ubuntu:24.04:LTSmore threats →ghsa
mozjs102
pkg:deb/ubuntu/mozjs102?arch=source&distro=noble
Affected versions
=102.15.1-1=102.15.1-3ubuntu2
Ubuntu:24.04:LTSmore threats →ghsa
mozjs115
pkg:deb/ubuntu/mozjs115?arch=source&distro=noble
Affected versions
=115.3.0-0ubuntu1=115.4.0-2=115.5.0-1=115.6.0-1=115.7.0-4=115.8.0-1=115.9.0-1=115.9.0-1build1=115.10.0-1

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AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 10/22/2026, 17:38:06 UTC

Technical Analysis

This vulnerability arises from incorrect boundary conditions in the Graphics: Canvas2D component of mozjs52. It was addressed by Mozilla in Firefox 158 and Thunderbird 158 releases, including ESR versions 153.5. The CVSS 3.1 score is 5.4 (medium), reflecting network attack vector, low attack complexity, no privileges required, user interaction required, and impacts to confidentiality and integrity but not availability. The vendor advisory confirms the fix in Firefox 158 and related versions.

Potential Impact

The vulnerability can lead to limited confidentiality and integrity impacts due to improper boundary checks in the Canvas2D graphics component. There is no reported impact on availability. No known exploitation in the wild has been documented.

Mitigation Recommendations

A fix is available and has been released in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5. Users and administrators should update to these versions or later to remediate the vulnerability. No additional mitigation actions are indicated by the vendor advisory.

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Technical Details

Gcve Source
db.gcve.eu
Osv Id
UBUNTU-CVE-2026-109731
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: 6ada45014d27ba8daa6a5aef

Added to database: 10/22/2026, 17:16:49 UTC

Last enriched: 10/22/2026, 17:38:06 UTC

Last updated: 10/22/2026, 17:38:06 UTC

Views: 3

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