CVE-2026-85390
Checkmate through 3.11.0 Missing Authorization on Maintenance Window, Notification, and Check Deletion Routes
- State
- Published
- Severity
- 7.1 High
- Published
- Sep 3, 2026
- Updated
- Sep 5, 2026
- Reserved
- Sep 3, 2026
Description
Checkmate through 3.11.0 omits the isAllowed role guard middleware on maintenance-window, notification, and check-deletion routes, allowing read-only users to perform administrative actions. Attackers with user-role sessions can create arbitrary maintenance windows to silence alerts, modify notification channels, and delete monitor check history to erase incident evidence.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 7.1 High | CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 7.1 High | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L | VulnCheck |
Weaknesses
- CWE-862 Missing Authorization
Affected Products
| Product | Versions |
|---|---|
Checkmatebluewave-labs |
|
References
- GitHub Issue #3916issue-tracking
- https://github.com/bluewave-labs/Checkmateproduct
- https://github.com/bluewave-labs/Checkmate/blob/v3.11.0/server/src/api/routes/maintenanceWindowRoutes.tstechnical-description
- https://github.com/bluewave-labs/Checkmate/blob/v3.11.0/server/src/api/routes/notificationRoutes.tstechnical-description
- https://github.com/bluewave-labs/Checkmate/blob/v3.11.0/server/src/api/routes/checkRoutes.tstechnical-description
- VulnCheck Advisory: Checkmate through 3.11.0 Missing Authorization on Maintenance Window, Notification, and Check Deletion Routesthird-party-advisory
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