Use-after-free in Mozilla products - CVE-2026-2769

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Main Vulnerability Database Vulnerabilities #VU123182

Use-after-free in Mozilla products - CVE-2026-2769

Published: February 24, 2026


Vulnerability identifier: #VU123182
CSH Severity: High
CVSS v4.0: 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-2026-2769
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: Mozilla
Affected software:
Mozilla Firefox
Firefox ESR
Firefox for Android

Detailed vulnerability description

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to a use-after-free error in the Storage: IndexedDB component. A remote attacker can trick the victim into visiting a specially crafted website, trigger a use-after-free error and execute arbitrary code on the system.



How to mitigate CVE-2026-2769

Install updates from vendor's website.

Sources