CVE-2026-71862

Checkmate: Sensitive Bearer Token Exposure via Public Status Pages When showURL Setting is Enabled

State: Published
Severity: 7.5 High
Published: Aug 21, 2026
Updated: Aug 21, 2026
Reserved: Aug 7, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N	GitHub_M

Weaknesses

CWE-200 Exposure of Sensitive Information to an Unauthorized Actor
CWE-522 Insufficiently Protected Credentials

Affected Products

Product	Versions
Checkmatebluewave-labs	>= 3.3.0, < 3.9.2Affected

References

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