CVEvulnerability

CVE-2026-20796

3.1 LOW Published 2026-02-13 Modified 2026-06-17 Official page ↗
Status
Analyzed
Published
2026-02-13
Last modified
2026-06-17
Assigner
[email protected]
CVSS 3.1 ([email protected])
3.1 LOW — CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N
Weaknesses
CWE-367

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

Affected configurations

• mattermost mattermost server (>= 10.11.0 < 10.11.10)

Related

Weakness · CWE (1)

  • CWE-367 Time-of-check Time-of-use (TOCTOU) Race Condition weakness

References