Main Vulnerability Database Vulnerabilities #VU126692

Input validation error in Mozilla Firefox and Firefox for Android - CVE-2026-6779

Published: April 21, 2026

Vulnerability identifier: #VU126692

CSH Severity: Low

CVSS v4: 2.1 [CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-6779

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due an unspecified error in the JavaScript Engine component. A remote attacker can bypass implemented security restrictions.

Mozilla Firefox
Firefox for Android
Anolis OS
Mozilla Thunderbird
firefox

Install updates from vendor's website.

Mozilla Firefox - update to 150.0
Firefox for Android - update to 150.0
Mozilla Thunderbird - update to 150.0
firefox - update to 140.10.0-1