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.
History

Sat, 05 Sep 2026 02:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Fri, 04 Sep 2026 03:45:00 +0000

Type Values Removed Values Added
First Time appeared Bluewave-labs
Bluewave-labs checkmate
Vendors & Products Bluewave-labs
Bluewave-labs checkmate

Thu, 03 Sep 2026 19:00:00 +0000

Type Values Removed Values Added
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.
Title Checkmate through 3.11.0 Missing Authorization on Maintenance Window, Notification, and Check Deletion Routes
First Time appeared Bluewavelabs
Bluewavelabs checkmate
Weaknesses CWE-862
CPEs cpe:2.3:a:bluewavelabs:checkmate:*:*:*:*:*:*:*:*
Vendors & Products Bluewavelabs
Bluewavelabs checkmate
References
Metrics cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:L'}

cvssV4_0

{'score': 7.1, 'vector': '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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-09-03T18:54:23.866Z

Updated: 2026-09-05T02:01:53.814Z

Reserved: 2026-09-03T18:10:46.045Z

Link: CVE-2026-85390

cve-icon Vulnrichment

Updated: 2026-09-05T02:01:48.247Z

cve-icon NVD

Status : Deferred

Published: 2026-09-03T19:17:30.690

Modified: 2026-09-10T15:53:23.707

Link: CVE-2026-85390

cve-icon Redhat

No data.