Mattermost 10.11 <=10.11.17 / 11.7 <=11.7.0 API Perm Check Missing (CVE-2026-8074)
CVE-2026-8074 Published on June 22, 2026
Improper Permission Check Allows User Manager to Deactivate Bot Accounts
Mattermost versions 11.7.x <= 11.7.0, 10.11.x <= 10.11.17 fail to enforce bot-specific permission checks on the user active status endpoint, which allows a User Manager with user management write access but no Integrations access to deactivate bot accounts via the PUT /api/v4/users/{id}/active API endpoint.. Mattermost Advisory ID: MMSA-2026-00667
Vulnerability Analysis
CVE-2026-8074 is exploitable with network access, and requires user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality, with no impact on integrity and availability.
Weakness Type
What is an AuthZ Vulnerability?
The software performs an authorization check when an actor attempts to access a resource or perform an action, but it does not correctly perform the check. This allows attackers to bypass intended access restrictions.
CVE-2026-8074 has been classified to as an AuthZ vulnerability or weakness.
Products Associated with CVE-2026-8074
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Affected Versions
Mattermost:- Version 11.7.0, <= 11.7.0 is affected.
- Version 10.11.0, <= 10.11.17 is affected.
- Version 11.8.0 is unaffected.
- Version 11.7.1 is unaffected.
- Version 10.11.18 is unaffected.