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CVE-2026-7184GO-2026-6282GHSA-9P44-R552-4WP9

Mattermost Remote Cluster PATCH API Leaks Authentication Tokens

Published
Last modified
published
Not listed in CISA KEV
Fix
Fixed in 10.11.16+incompatible, 11.5.5+incompatible, 11.6.1+incompatible, 8.0.0-20260428142921-bd8fc9222672, 11.6.1, and 2 more
None on Exploit-DB, Metasploit or GitHub
  • Exploitation: none
  • Automatable: no
  • Technical impact: partial

Summary

Mattermost versions 11.6.x <= 11.6.1, 11.5.x <= 11.5.4, 10.11.x <= 10.11.15 fail to sanitize the Remote Cluster API response on PATCH operations, which allows authenticated users with the {{manage_secure_connections}} permission to obtain remote cluster authentication tokens via a PATCH request to the remote cluster endpoint.. Mattermost Advisory ID: MMSA-2026-00662

Timeline

  1. CVE published
  2. CISA SSVC assessment

    Exploitation: none · Automatable: no · Technical impact: partial

  3. Record last updated

Affected versions

  • Mattermost Mattermost

    From 11.6.0 · through 11.6.1; From 11.5.0 · through 11.5.4; From 10.11.0 · through 10.11.15

  • github.com/mattermost/mattermost-serverGo

    From 10.11.0+incompatible · fixed in 10.11.16+incompatible; From 11.5.0+incompatible · fixed in 11.5.5+incompatible; From 11.6.0+incompatible · fixed in 11.6.1+incompatible

  • github.com/mattermost/mattermost-server/v5Go

    All versions

  • github.com/mattermost/mattermost-server/v6Go

    All versions

  • github.com/mattermost/mattermost/server/v8Go

    From 8.0.0-20250731163400-5b955468ea1e · fixed in 8.0.0-20260428142921-bd8fc9222672

  • github.com/mattermost/mattermost-serverGo

    From 11.6.0 · fixed in 11.6.1

  • github.com/mattermost/mattermost-serverGo

    From 11.5.0 · fixed in 11.5.5

  • github.com/mattermost/mattermost-serverGo

    From 10.11.0 · fixed in 10.11.16

References 1

mattermost.com