A vulnerability classified as problematic has been found in Mattermost up to 10.11.17/11.5.5/11.6.2/11.7.0/11.7.x . This affects an unknown part of the component Websocket Connection Handler . Performing a manipulation results in session expiration. This vulnerability was named CVE-2026-9162 . The attack may be initiated remotely. There is no available exploit. It is recommended to upgrade the affected component.