CVE-2026-8823
LOW
3.8
Our Analysis: General Purpose
Our model has classified this vulnerability as relevant to General Purpose Systems, helping your team prioritize efforts effectively.
Published Date
June 22, 2026
Last Modified
June 22, 2026
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L
Description
Mattermost versions 11.7.x <= 11.7.0, 10.11.x <= 10.11.17 fail to validate bot targets when demoting users to guests which allows a lower-privileged administrator to degrade arbitrary bot accounts via the standard demote-user API.. Mattermost Advisory ID: MMSA-2026-00669