Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/bluewave-labs/Checkmate
- https://github.com/bluewave-labs/Checkmate/blob/v3.11.0/server/src/api/routes/ch
- https://github.com/bluewave-labs/Checkmate/blob/v3.11.0/server/src/api/routes/ma
- https://github.com/bluewave-labs/Checkmate/blob/v3.11.0/server/src/api/routes/no
- https://github.com/bluewave-labs/Checkmate/issues/3916
- https://www.vulncheck.com/advisories/checkmate-through-3.11.0-missing-authorizat
- https://github.com/bluewave-labs/Checkmate/issues/3916
FAQ
What is CVE-2026-85390?
CVE-2026-85390 is a vulnerability with a CVSS score of 7.1 (HIGH). 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...
How severe is CVE-2026-85390?
CVE-2026-85390 has been rated HIGH with a CVSS base score of 7.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-85390?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.