Mattermost security advisory (AV26-1104)

Serial number: AV26-1104 Date: October 29, 2026 As of October 28, 2026, Mattermost is affected by a vulnerability in the following product: Mattermost Prior to or equal to 11.10.0 Prior to or equal to 11.9.2 Prior to or equal to 11.8.6 Prior to or equal to 11.7.11 The Cyber Centre encourages users and administrators to review the provided web link and apply any necessary updates as they become available. Mattermost Security Updates