CVE-2026-28759 | Mattermost up to 10.11.13/11.4.3/11.5.1 Membership authorization

SecurityVulns
Yanac

A vulnerability identified as problematic has been detected in Mattermost up to 10.11.13/11.4.3/11.5.1. This affects an unknown part of the component Membership Handler. Performing a manipulation results in incorrect authorization.

This vulnerability was named CVE-2026-28759. The attack may be initiated remotely. There is no available exploit.

You should upgrade the affected component.VulDB Recent EntriesRead More