Improper access control in Mozilla products - CVE-2026-6761
Published: April 21, 2026
Vulnerability identifier: #VU126668
CSH Severity: High
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-6761
CWE-ID: CWE-284
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Mozilla Firefox
Firefox ESR
Firefox for Android
Mozilla Firefox
Firefox ESR
Firefox for Android
Software vendor:
Mozilla
Mozilla
Description
The vulnerability allows a remote attacker to escalate privileges.
The vulnerability exists due to improper access control in the Networking component when processing crafted web content. A remote attacker can cause the browser to process specially crafted content to escalate privileges.
User interaction is required to visit a specially crafted website or URL.
Remediation
Install security update from vendor's website.