High severity8.8NVD Advisory· Published Feb 16, 2026· Updated Apr 13, 2026

CVE-2026-2447

Description

Heap buffer overflow in libvpx. This vulnerability was fixed in Firefox 147.0.4, Firefox ESR 140.7.1, Firefox ESR 115.32.1, Thunderbird 140.7.2, and Thunderbird 147.0.2.

Affected products

Mozilla Corporation/Firefox2 versions
cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*+ 1 more
- cpe:2.3:a:mozilla:firefox:*:*:*:*:-:*:*:*range: <147.0.4
- cpe:2.3:a:mozilla:firefox:*:*:*:*:esr:*:*:*range: <115.32.1
Mozilla Corporation/Thunderbird
cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:*
Range: <140.7.2

Patches

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

www.mozilla.org/security/advisories/mfsa2026-10/nvdVendor Advisory
www.mozilla.org/security/advisories/mfsa2026-11/nvdVendor Advisory
bugzilla.mozilla.org/show_bug.cginvdIssue TrackingPermissions Required
lists.debian.org/debian-lts-announce/2026/02/msg00028.htmlnvd

News mentions

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