CVE-2026-6751

Uninitialized memory in the Audio/Video: Web Codecs component

High · published April 21, 2026

CVSS v3.1
7.3
EPSS
0%
Percentile
38.7
In the wild
Unconfirmed
What it is

Uninitialized memory in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 150, Firefox ESR 140.10, Thunderbird 150, and Thunderbird 140.10.

The record
Technical detail
CVSS v3.1
7.3 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CVSS v4.0
Not supplied
EPSS
0.00458 · 38.7th percentile
Published
2026-04-21T12:40Z
EPSS history
Timeline
  • 21 APR 12:40Z
    Uninitialized memory in the Audio/Video: Web Codecs component
    cvelistv5