Buffer overflow in Mozilla Firefox and Firefox for Android - CVE-2026-124946
Published: November 10, 2026
Vulnerability identifier: #VU164586
CSH Severity: Low
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-124946
CWE-ID: CWE-119
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to potentially cause a denial of service.
The vulnerability exists due to improper handling of an invalid pointer in Firefox's JavaScript Engine: JIT component when processing JavaScript. A remote attacker can supply crafted JavaScript that triggers an invalid memory reference to potentially crash the browser.
Affected software
Mozilla Firefox
Firefox for Android
Firefox for Android
How to mitigate CVE-2026-124946
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