Mattermost doesn't validate whether users were correctly owned by the correct Connected Workspace
| Reporter | Title | Published | Views | Family All 20 |
|---|---|---|---|---|
 | CVE-2026-27769 | 15 Apr 202610:11 | – | attackerkb |
 | Mattermost Authentication Bypass | 20 Apr 202600:00 | – | bdu_fstec |
 | CVE-2026-27769 | 15 Apr 202612:30 | – | circl |
 | Mattermost security vulnerabilities | 15 Apr 202600:00 | – | cnnvd |
 | CVE-2026-27769 | 15 Apr 202610:11 | – | cve |
 | CVE-2026-27769 Connected Workspaces: Malicious remote server can manipulate arbitrary user's status | 15 Apr 202610:11 | – | cvelist |
 | EUVD-2026-22873 | 17 Apr 202615:31 | – | euvd |
 | Mattermost Server 10.11.x < 10.11.13 Improper Validation (MMSA-2026-00603) | 24 Apr 202600:00 | – | nessus |
 | CVE-2026-27769 | 15 Apr 202610:11 | – | mend |
 | CVE-2026-27769 | 15 Apr 202611:16 | – | nvd |
10
Node
mattermostmattermost-serverRange8.0.0-20250721062209-4952acea88ce–8.0.0-20260316060126-bc1a2b34b1f9go
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28 Apr 2026 23:02Current
6.3Medium risk
Vulners AI Score6.3
CVSS 3.12.7
EPSS0.00267
SSVC