CVE-2026-2447

HIGH

8.8

Description

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

CVE Details

CVSS v3.1 Score8.8

SeverityHIGH

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionREQUIRED

Published2/16/2026

Last Modified2/22/2026

Sourcenvd

Honeypot Sightings0

Affected Products

mozilla:firefoxmozilla:thunderbird

Weaknesses (CWE)

CWE-122

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2014390(security@mozilla.org)

https://www.mozilla.org/security/advisories/mfsa2026-10/(security@mozilla.org)

https://www.mozilla.org/security/advisories/mfsa2026-11/(security@mozilla.org)

https://lists.debian.org/debian-lts-announce/2026/02/msg00028.html(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.