Incorrect calculation in Mozilla Firefox and Firefox for Android - CVE-2026-16392

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Main Vulnerability Database Vulnerabilities #VU139010

Incorrect calculation in Mozilla Firefox and Firefox for Android - CVE-2026-16392

Published: July 22, 2026


Vulnerability identifier: #VU139010
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-16392
CWE-ID: CWE-682
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: Mozilla
Affected software:
Mozilla Firefox
Firefox for Android

Detailed vulnerability description

The vulnerability allows a remote attacker to execute arbitrary code.

The vulnerability exists due to JIT miscompilation in the JavaScript Engine: JIT component when compiling script code. A remote attacker can supply crafted script code to execute arbitrary code.


How to mitigate CVE-2026-16392

Install security update from vendor's website.

Sources