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.