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Untriaged
Permalink CVE-2026-20796
3.1 LOW
  • CVSS version: 3.1
  • Attack vector (AV): NETWORK
  • Attack complexity (AC): HIGH
  • Privileges required (PR): LOW
  • User interaction (UI): NONE
  • Scope (S): UNCHANGED
  • Confidentiality impact (C): LOW
  • Integrity impact (I): NONE
  • Availability impact (A): NONE
created 2 months ago
Time-of-check time-of-use vulnerability in common teams API

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

References

Affected products

Mattermost
  • =<10.11.9
  • ==11.3.0
  • ==10.11.10

Matching in nixpkgs

pkgs.mattermost

Mattermost is an open source platform for secure collaboration across the entire software development lifecycle

pkgs.mattermostLatest

Mattermost is an open source platform for secure collaboration across the entire software development lifecycle

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