CVE-2026-8823

CVE-2026-8823CVE-2026-8823

mattermost / mattermost_server

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

Scoring

CVSS 3.8 ()
VectorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L
Last modified2026-06-26
Sourced from NVD. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.