CVE-2026-6751

HIGH

Uninitialized memory in the Audio/Video: Web Codecs component

Title source: cna
STIX 2.1

Description

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.

References (5)

Scores

CVSS v3 7.3
EPSS 0.0006
EPSS Percentile 17.9%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact partial

Details

CWE
CWE-457
Status published
Products (7)
mozilla/firefox < 140.10.0
mozilla/firefox < 150.0
Mozilla/Firefox 140.10 - 140.*
Mozilla/Firefox 150
mozilla/thunderbird 140.0 - 140.10.0
Mozilla/Thunderbird 140.10 - 140.*
Mozilla/Thunderbird 150
Published Apr 21, 2026
Tracked Since Apr 21, 2026