Vulnerability · Published Aug 21, 2026 · Assigned by GitHub_M

CVE-2026-71862Checkmate: Sensitive Bearer Token Exposure via Public Status Pages When showURL Setting is Enabled

High 7.5

In plain English

A high-severity information exposure in Checkmate from bluewave-labs. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 42% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.5%top 58.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
bluewave-labs	Checkmate	>= 3.3.0, < 3.9.2

Weakness: CWE-200, CWE-522 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

References

https://github.com/bluewave-labs/Checkmate/security/advisories/GHSA-3m74-8cg9-rp8j x_refsource_CONFIRM
https://github.com/bluewave-labs/Checkmate/pull/3758 x_refsource_MISC
https://github.com/bluewave-labs/Checkmate/commit/cc1814f507041bb0f64845bed5d5442c21e920f2 x_refsource_MISC
https://github.com/bluewave-labs/Checkmate/releases/tag/v3.9.2 x_refsource_MISC