CVE-2026-0880
HIGH severity · CVSS 8.8 · Integer overflow
8.8CVSS HIGH
Summary
Sandbox escape due to integer overflow in the Graphics component. This vulnerability was fixed in Firefox 147, Firefox ESR 115.32, Firefox ESR 140.7, Thunderbird 147, and Thunderbird 140.7.
Impact & exploitability
Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionRequired
Confidentiality impactHigh
Integrity impactHigh
Availability impactHigh
Exploit probability (EPSS)1%
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/mfsa2026-01/Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-02/Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-03/Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-04/Advisory
- https://www.mozilla.org/security/advisories/mfsa2026-05/Advisory
- https://bugzilla.mozilla.org/show_bug.cgi?id=2005014