CVE-2026-6673 | Mattermost up to 11.7.x missing authentication

June 22, 2026 Yanac

A vulnerability categorized as critical has been discovered in Mattermost up to 10.11.17/11.5.5/11.6.2/11.7.0/11.7.x. This affects an unknown function. Executing a manipulation can lead to missing authentication.

This vulnerability appears as CVE-2026-6673. The attack may be performed from remote. There is no available exploit.

It is advisable to upgrade the affected component.VulDB Recent EntriesRead More