CVE-2026-2447

Heap buffer overflow in libvpx

High · published February 16, 2026

CVSS v3.1
8.8
EPSS
1%
Percentile
52.6
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
8.8 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00699 · 52.6th percentile
Published
2026-02-16T14:13Z
EPSS history
Timeline
  • 16 FEB 14:13Z
    Heap buffer overflow in libvpx
    cvelistv5