CVE-2026-4697

Incorrect boundary conditions in the Audio/Video: Web Codecs component

High · published March 24, 2026

CVSS v3.1
7.5
EPSS
1%
Percentile
51.9
In the wild
Unconfirmed
What it is

Incorrect boundary conditions in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.

The record
Technical detail
CVSS v3.1
7.5 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00687 · 51.9th percentile
Published
2026-03-24T12:30Z
EPSS history
Timeline
  • 24 MAR 12:30Z
    Incorrect boundary conditions in the Audio/Video: Web Codecs component
    cvelistv5