CVE-2026-85390 [HIGH] – Checkmate through 3.11.0 omits the isAllowed role guard middleware on maintenance-window,

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.