Use of uninitialized resource in Mozilla Firefox and Firefox for Android - CVE-2026-113400
Published: October 21, 2026
Vulnerability identifier: #VU156681
CSH Severity: Medium
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-113400
CWE-ID: CWE-908
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to potentially disclose memory contents or cause a denial of service.
The vulnerability exists due to use of uninitialized memory in the Firefox Audio/Video: cubeb component when handling audio operations. A remote attacker can lure a victim into visiting a specially crafted website that exercises the affected component to potentially expose residual memory contents or trigger a crash.
Affected software
Mozilla Firefox
Firefox for Android
Firefox for Android
How to mitigate CVE-2026-113400
Install security update from vendor's website.
Mozilla Firefox - update to 158.0.1
Firefox for Android - update to 158.0.1
Firefox for Android - update to 158.0.1