CVE-2026-4724

CRITICAL

Undefined behavior in the Audio/Video component

Title source: cna

Undefined behavior in the Audio/Video component. This vulnerability was fixed in Firefox 149 and Thunderbird 149.

Core 3

Core References

CVSS v3 9.1

EPSS 0.0002

EPSS Percentile 4.1%

Attack Vector NETWORK

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Vulnrichment

Exploitation none

Automatable yes

Technical Impact total

CWE

CWE-758

Status published

Products (6)

mozilla/firefox < 149.0

Mozilla/Firefox 149

Mozilla/Firefox unspecified - 149

mozilla/thunderbird < 149.0

Mozilla/Thunderbird 149

Mozilla/Thunderbird unspecified - 149

Published Mar 24, 2026

Tracked Since Mar 24, 2026