CVE-2026-100820 | Mozilla Firefox up to 140.16/153.3/156 Address Bar privileges management

September 29, 2026 Yanac

A vulnerability classified as critical was found in Mozilla Firefox up to 140.16/153.3/156. Affected by this issue is some unknown functionality of the component Address Bar. The manipulation results in improper privilege management.

This vulnerability is known as CVE-2026-100820. It is possible to launch the attack remotely. No exploit is available.

Upgrading the affected component is advised.VulDB Recent EntriesRead More