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