CVE-2026-109731
Deferred Deferred - Pending Action

Incorrect Boundary Handling in Firefox Graphics: Canvas2D

Publication date: 2026-10-13

Last updated on: 2026-10-13

Assigner: Mozilla Corporation

Description
Incorrect boundary conditions in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 158, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.

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Meta Information

Published
2026-10-13
Last Modified
2026-10-13
Generated
2026-10-19
AI Q&A
2026-10-13
EPSS Evaluated
2026-10-18
NVD
CVE-2026-109731
EUVD
EUVD-2026-98495

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
mozilla firefox 158
mozilla firefox_esr 153.5

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This vulnerability involves incorrect boundary conditions in the Graphics: Canvas2D component of Firefox. This flaw could allow attackers to exploit memory corruption issues, potentially leading to arbitrary code execution or denial of service.

Detection Guidance

Detection requires checking Firefox version. Run 'firefox --version' or check 'about:support' in Firefox. Versions below 158 or Firefox ESR below 153.5 are vulnerable.

Impact Analysis

If exploited, this vulnerability could allow attackers to run malicious code on your system, steal sensitive data, or crash your browser. Users of affected Firefox versions are at risk until they update to Firefox 158 or Firefox ESR 153.5.

Compliance Impact

The provided CVE data does not specify any direct impact on compliance with standards like GDPR or HIPAA. The vulnerability involves incorrect boundary conditions in the Graphics: Canvas2D component, which could potentially lead to memory corruption or crashes but lacks details on data exposure or privacy implications.

Mitigation Strategies

Update Firefox to version 158 or later and Firefox ESR to 153.5 or later. Disable Canvas2D if not needed by setting 'gfx.canvas2d.enabled' to false in about:config.

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