Security Advisory

CVE-2026-26230

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2026-03-16 20:19:51

Last updated 2026-03-17 13:37:17

Assigner Mattermost

State PUBLISHED

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

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