CVE-2026-4725

Sandbox escape due to use-after-free in the Graphics: Canvas2D component

State: Published
Severity: 9.3 Critical
Published: Mar 24, 2026
Updated: Apr 13, 2026
Reserved: Mar 23, 2026

Description

Sandbox escape due to use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 149 and Thunderbird 149.

Scores

CVSS	Score	Vector	Source
3.1	9.3 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N	CISA-ADP

Weaknesses

CWE-416 Use After Free

Affected Products

Product	Versions
FirefoxMozilla	149 and laterNot affected
ThunderbirdMozilla	149 and laterNot affected

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2017108
https://www.mozilla.org/security/advisories/mfsa2026-20/
https://www.mozilla.org/security/advisories/mfsa2026-23/

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.