CVE-2026-27769
Connected Workspaces: Malicious remote server can manipulate arbitrary user's status
- State
- Published
- Severity
- 2.7 Low
- Published
- Apr 15, 2026
- Updated
- Apr 15, 2026
- Reserved
- Mar 16, 2026
Description
Mattermost versions 10.11.x <= 10.11.12 fail to validate whether users were correctly owned by the correct Connected Workspace which allows a malicious remote server connected using the Conntexted Workspaces feature to change the displayed status of local users via the Connected Workspaces API.. Mattermost Advisory ID: MMSA-2026-00603
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 2.7 Low | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:N | Mattermost |
Weaknesses
- CWE-862 Missing Authorization
Affected Products
| Product | Versions |
|---|---|
MattermostMattermost |
|
References
- MMSA-2026-00603vendor-advisory
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