Critical severity9.8NVD Advisory· Published Jan 13, 2026· Updated Apr 13, 2026
CVE-2026-0879
CVE-2026-0879
Description
Sandbox escape due to incorrect boundary conditions 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.
Affected products
4cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*+ 1 more
- cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*range: <147.0
- cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*range: <115.32.0
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*+ 1 more
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:-:*:*:*range: <147.0
- cpe:2.3:a:mozilla:thunderbird:*:*:*:*:esr:*:*:*range: <140.7.0
Patches
0No patches discovered yet.
Vulnerability mechanics
AI mechanics synthesis has not run for this CVE yet.
References
6- www.mozilla.org/security/advisories/mfsa2026-01/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-02/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-03/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-04/nvdVendor Advisory
- www.mozilla.org/security/advisories/mfsa2026-05/nvdVendor Advisory
- bugzilla.mozilla.org/show_bug.cginvdPermissions Required
News mentions
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