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Suggestion detail

Untriaged
Permalink CVE-2026-10106
6.5 MEDIUM
  • CVSS version (CVSS): 3.1
  • Attack Vector (AV): Network (N)
  • Attack Complexity (AC): Low (L)
  • Privileges Required (PR): Low (L)
  • User Interaction (UI): None (N)
  • Scope (S): Unchanged (U)
  • Confidentiality (C): None (N)
  • Integrity (I): High (H)
  • Availability (A): None (N)
  • Modified Attack Vector (MAV): Network (N)
  • Modified Attack Complexity (MAC): Low (L)
  • Modified Privileges Required (MPR): Low (L)
  • Modified User Interaction (MUI): None (N)
  • Modified Confidentiality (MC): None (N)
  • Modified Scope (MS): Unchanged (U)
  • Modified Integrity (MI): High (H)
  • Modified Availability (MA): None (N)
created 12 hours ago Activity log
  • Created suggestion 12 hours ago
Unauthorized users can trigger interactive post actions in private channels via action cookie channel mismatch in Mattermost

Mattermost versions 11.7.x <= 11.7.2, 11.6.x <= 11.6.4, 10.11.x <= 10.11.19 fail to verify that the channel referenced in an action cookie matches the channel of the target post, which allows an authenticated user without access to a private channel to trigger interactive post actions on posts in that channel via a cookie obtained from any accessible channel.. Mattermost Advisory ID: MMSA-2026-00690

References

Affected products

Mattermost
  • =<11.6.4
  • ==11.6.5
  • ==11.8.0
  • ==11.7.3
  • ==10.11.20
  • =<10.11.19
  • =<11.7.2

Matching in nixpkgs

pkgs.mattermost

Open source platform for secure collaboration across the entire software development lifecycle

pkgs.mattermostLatest

Open source platform for secure collaboration across the entire software development lifecycle

Package maintainers