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

INFO

Published Date :

2026-03-16T20:19:51.287Z

Last Modified :

2026-03-16T20:19:51.287Z

Source :

Mattermost
AFFECTED PRODUCTS

The following products are affected by CVE-2026-26230 vulnerability.

No data.

REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-26230.

URL Resource
https://mattermost.com/security-updates cve-icon cve-icon
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CVSS Vulnerability Scoring System

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