Use of uninitialized resource in Mozilla Firefox and Firefox for Android - CVE-2026-124920
Published: November 10, 2026
Vulnerability identifier: #VU164577
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-124920
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 sensitive information.
The vulnerability exists due to use of uninitialized memory in Firefox's Graphics: WebGPU component when processing graphics operations. A remote attacker can trigger crafted operations to potentially expose residual memory contents.
Affected software
Mozilla Firefox
Firefox for Android
Firefox for Android
How to mitigate CVE-2026-124920
Install security update from vendor's website.
Mozilla Firefox - update to 160.0
Firefox for Android - update to 160.0
Firefox for Android - update to 160.0