#VU124328 Use After Free in Mozilla Firefox and Firefox for Android - CVE-2026-4723

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Main Vulnerability Database Vulnerabilities #VU124328

#VU124328 Use After Free in Mozilla Firefox and Firefox for Android - CVE-2026-4723

Published: March 24, 2026


Vulnerability identifier: #VU124328
Vulnerability risk: High
CVSSv4.0: 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/E:U/U:Amber
CVE-ID: CVE-2026-4723
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Mozilla Firefox
Firefox for Android
Software vendor:
Mozilla

Description

The vulnerability allows a remote attacker to execute arbitrary code.

The vulnerability exists due to a use-after-free in the JavaScript Engine component when processing JavaScript code. A remote attacker can trick the victim into visiting a specially crafted website to execute arbitrary code.


Remediation

Install security update from vendor's website.

External links