Security Advisory
CVE-2026-85390
7.1
HIGH
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.
Published Date
September 3, 2026
Official Source
NIST NVD Advisory