Description
Race condition in the Graphics component. This vulnerability was fixed in Firefox 145, Firefox ESR 140.5, Firefox ESR 115.30, Thunderbird 145, and Thunderbird 140.5.
Affected products
mozilla: firefox
References6
- www.mozilla.org/security/advisories/mfsa2025-87/ Vendor Advisory
- www.mozilla.org/security/advisories/mfsa2025-88/ Vendor Advisory
- www.mozilla.org/security/advisories/mfsa2025-89/ Vendor Advisory
- bugzilla.mozilla.org/show_bug.cgi?id=1991458 Permissions Required
- www.mozilla.org/security/advisories/mfsa2025-90/
- www.mozilla.org/security/advisories/mfsa2025-91/
Metrics
- CVSS 3.1
-
7.5
HIGH
Score source: CNA
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 0% percentile: 16 · as of 10 November 2026
- CWE
- CWE-362
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.