bluewave-labs Checkmate up to 3.9.1 Status Page Controller statusPageController.ts secret improper authorization

Summaryinfo

A vulnerability was found in bluewave-labs Checkmate up to 3.9.1. It has been rated as problematic. Affected by this vulnerability is an unknown functionality of the file server/src/controllers/statusPageController.ts of the component Status Page Controller. The manipulation of the argument secret leads to improper authorization. This vulnerability is listed as CVE-2026-71862. The attack may be initiated remotely. There is no available exploit.

Detailsinfo

A vulnerability was found in bluewave-labs Checkmate up to 3.9.1. It has been rated as problematic. This issue affects an unknown function of the file server/src/controllers/statusPageController.ts of the component Status Page Controller. The manipulation of the argument secret with an unknown input leads to a improper authorization vulnerability. Using CWE to declare the problem leads to CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. Impacted is confidentiality. The summary by CVE is:

Checkmate is an open-source, self-hosted tool designed to track and monitor server hardware, uptime, response times, and incidents in real-time with beautiful visualizations. From 3.3.0 until 3.9.2, enabling the global showURL setting causes the unauthenticated GET /api/v1/status-page/:url endpoint to return complete monitor objects from server/src/controllers/statusPageController.ts. The response includes the secret field used by HttpProvider.ts as an HTTP Authorization credential, even though BaseStatusPage.tsx does not display that value, allowing visitors to extract credentials from the JSON response and use them against monitored services. This issue is fixed in version 3.9.2.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-71862 since 08/07/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1548.002 according to MITRE ATT&CK.

Upgrading to version 3.9.2 eliminates this vulnerability.

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Productinfo

Vendor

• bluewave-labs

Name

• Checkmate

Version

• 3.9.0
• 3.9.1

Website

• Product: https://github.com/bluewave-labs/Checkmate/

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