CVE-2026-84131
HIGH severity · CVSS 8.8 · CWE-763
8.8CVSS HIGH
Summary
Privilege escalation due to invalid pointer in the Graphics component. This vulnerability was fixed in Firefox 155, Firefox ESR 115.40, Firefox ESR 140.15, Firefox ESR 153.2, Thunderbird 155, Thunderbird 140.15, and Thunderbird 153.2.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionRequired
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)0%
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Affected products we track (2)
Recommendation
Apply the vendor fix promptly. Open any affected product above for its exact safe version.
Additional information
- NVD record
- https://www.mozilla.org/security/advisories/mfsa2026-82/Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-83/Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-84/Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-85/Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-86/Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-87/Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-88/Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=2060008