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 (35)

Core 35
Core References

Scores

CVSS v3 7.3
EPSS 0.0031
EPSS Percentile 23.0%
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 yes
Technical Impact partial

Details

CWE
CWE-457 CWE-824
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