Information disclosure in Bluewave-Labs Checkmate
CVE-2026-71862
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.
Vulnerability class: Information Disclosure
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
Affected products
- Bluewave-labs Checkmate — versions >= 3.3.0, < 3.9.2
Weakness classification (CWE)
References
- https://github.com/bluewave-labs/Checkmate/commit/cc1814f507041bb0f64845bed5d5442c21e920f2 (x_refsource_MISC)
- https://github.com/bluewave-labs/Checkmate/pull/3758 (x_refsource_MISC)
- https://github.com/bluewave-labs/Checkmate/releases/tag/v3.9.2 (x_refsource_MISC)
- https://github.com/bluewave-labs/Checkmate/security/advisories/GHSA-3m74-8cg9-rp8j (x_refsource_CONFIRM)
Frequently asked questions
- What is CVE-2026-71862?
- CVE-2026-71862 is a high-severity vulnerability in Bluewave-Labs Checkmate, classified under Information Disclosure. CVSS score: 7.5/10. Published 2026-08-21.
- How severe is CVE-2026-71862?
- High severity. CVSS v3 base score is 7.5 out of 10.