CVE-2026-84140 | Mozilla Firefox up to 153.1/154 Navigation isolation

September 1, 2026 Yanac

A vulnerability classified as critical was found in Mozilla Firefox up to 153.1/154. Affected by this vulnerability is an unknown functionality of the component Navigation Component. Such manipulation leads to improper isolation or compartmentalization.

This vulnerability is listed as CVE-2026-84140. The attack may be performed from remote. There is no available exploit.

Upgrading the affected component is advised.VulDB Recent EntriesRead More