CVE-2026-8823

LowCVSS 3.8/10Last modified Jun 26, 2026

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

Metrics

CVSS 3.1 3.8/10CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:L

Weakness enumeration

CWE-863

Affected software

No affected versions have been published.

Timeline

Published: Jun 22, 2026
Last modified: Jun 26, 2026
NVD status: Analyzed

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