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CVE-2026-26230

LOW CVSS: 3.8 Published: 2026-03-16 Modified: 2026-06-17

Description

Mattermost versions 10.11.x <= 10.11.10 fail to properly validate permission requirements in the team member roles API endpoint which allows team administrators to demote members to guest role. Mattermost Advisory ID: MMSA-2025-00531

Affected Platforms

Mattermost Mattermost Server

Weakness Type

CWE-863

References