CVE-2026-85390

Checkmate through 3.11.0 Missing Authorization on Maintenance Window, Notification, and Check Deletion Routes

Published Sep 3, 2026 CVSS 4.0 · 7.1 High EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

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

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

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Sep 5, 2026, 2:01 AM
Reserved
Sep 3, 2026, 6:10 PM
Status
Deferred
Published
Sep 3, 2026, 7:17 PM
Modified
Sep 10, 2026, 3:53 PM