Use-after-free in Mozilla products - CVE-2026-124907
Published: November 10, 2026
Vulnerability identifier: #VU164541
CSH Severity: High
CVSS v4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-124907
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to escalate privileges and escape sandbox restrictions.
The vulnerability exists due to use-after-free in the Graphics: CanvasWebGL component when processing WebGL operations. A remote attacker can trigger access to freed memory through affected graphics operations to obtain elevated privileges and bypass sandbox isolation.
Affected software
Firefox ESR
Mozilla Firefox
Firefox for Android
Mozilla Firefox
Firefox for Android
How to mitigate CVE-2026-124907
Install security update from vendor's website.
Firefox ESR - update to 153.7.0
Firefox for Android - update to 160.0
Mozilla Firefox - update to 160.0
Firefox for Android - update to 160.0
Mozilla Firefox - update to 160.0