Out-of-bounds read in Mozilla products - CVE-2026-12324
Published: June 16, 2026
Vulnerability identifier: #VU134632
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-12324
CWE-ID: CWE-125
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Mozilla
Affected software:
Firefox for Android
Mozilla Firefox
Firefox ESR
Firefox for Android
Mozilla Firefox
Firefox ESR
Detailed vulnerability description
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to out-of-bounds read in the Graphics: CanvasWebGL component when rendering WebGL content. A remote attacker can trigger the vulnerable behavior to cause a denial of service.
How to mitigate CVE-2026-12324
Install security update from vendor's website.