Description

Mattermost versions 10.11.x <= 10.11.9 fail to properly validate channel membership at the time of data retrieval which allows a deactivated user to learn team names they should not have access to via a race condition in the /common_teams API endpoint.. Mattermost Advisory ID: MMSA-2025-00549

INFO

Published Date :

2026-02-13T10:30:03.445Z

Last Modified :

2026-02-13T17:02:25.985Z

Source :

Mattermost
AFFECTED PRODUCTS

The following products are affected by CVE-2026-20796 vulnerability.

Vendors Products
Mattermost
  • Mattermost
  • Mattermost Server
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-20796.

URL Resource
https://mattermost.com/security-updates cve-icon cve-icon
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