CVE-2026-85390CWE-862broken-access-control

CVE-2026-85390

High · published September 3, 2026

CVSS v3.1
7.1
EPSS
0%
Percentile
40.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.1 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L
CVSS v4.0
7.1 · 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
EPSS
0.00486 · 40.9th percentile
Weakness
CWE-862 · Missing Authorization
Published
2026-09-03T23:17Z
References (7)
https://github.com/bluewave-labs/Checkmate · [email protected]https://github.com/bluewave-labs/Checkmate/blob/v3.11.0/server/src/api/routes/checkRoutes.ts · [email protected]https://github.com/bluewave-labs/Checkmate/blob/v3.11.0/server/src/api/routes/maintenanceWindowRoutes.ts · [email protected]https://github.com/bluewave-labs/Checkmate/blob/v3.11.0/server/src/api/routes/notificationRoutes.ts · [email protected]https://github.com/bluewave-labs/Checkmate/issues/3916 · [email protected]https://www.vulncheck.com/advisories/checkmate-through-3.11.0-missing-authorization-on-maintenance-window-notification-and-check-deletion-routes · [email protected]https://github.com/bluewave-labs/Checkmate/issues/3916 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 05 SEP 03:44Z
    EPSS moved — → 0%
    epss
  • 03 SEP 18:54Z
    Checkmate through 3.11.0 Missing Authorization on Maintenance Window, Notification, and Check Deletion Routes
    cvelistv5