CVE-2026-85390
High · 7.1CVSS
7.1
EPSS
0.5%
Published
Sep 3, 2026
CISA due date
—
The record
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.
Affected packages
| Ecosystem | Package | Introduced | Fixed |
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