CVE-2026-92014

Privilege escalation due to incorrect boundary conditions in the Graphics component

State: Published
Severity: 8.8 High
Published: Sep 15, 2026
Updated: Sep 16, 2026
Reserved: Sep 15, 2026

Description

Privilege escalation due to incorrect boundary conditions in the Graphics component. This vulnerability was fixed in Firefox ESR 115.41, Firefox ESR 140.16, and Thunderbird 140.16.

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H	CISA-ADP

Weaknesses

CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

Affected Products

Product	Versions
FirefoxMozilla	115.41 through 115.*Not affected 140.16 and laterNot affected
ThunderbirdMozilla	140.16 and laterNot affected

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2060000
https://www.mozilla.org/security/advisories/mfsa2026-91/
https://www.mozilla.org/security/advisories/mfsa2026-92/
https://www.mozilla.org/security/advisories/mfsa2026-95/

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