CVE-2026-71862: CWE-200: Exposure of Sensitive Information to an Unauthorized Actor in bluewave-labs Checkmate
Checkmate versions 3.3.0 through 3.9.1 have a vulnerability where enabling the global showURL setting causes an unauthenticated API endpoint to expose sensitive authorization credentials. Specifically, the GET /api/v1/status-page/:url endpoint returns monitor objects including a secret field used for HTTP authorization. This allows unauthorized actors to extract credentials from the JSON response. The issue is fixed in version 3.9.2.
AI Analysis
Technical Summary
In Checkmate, an open-source server monitoring tool, versions from 3.3.0 up to but not including 3.9.2 have a security flaw triggered by enabling the global showURL setting. This flaw causes the unauthenticated GET /api/v1/status-page/:url endpoint to return full monitor objects containing a secret field used as an HTTP Authorization credential. Although the frontend does not display this secret, it is present in the JSON response, enabling unauthorized users to obtain sensitive credentials and potentially misuse them against monitored services. The vulnerability is identified as CWE-200 (Exposure of Sensitive Information) and CWE-522 (Insufficiently Protected Credentials). The vulnerability has a CVSS 3.1 score of 7.5 (high severity) and is fixed in version 3.9.2.
Potential Impact
Unauthorized actors can retrieve sensitive HTTP Authorization credentials from the unauthenticated API endpoint when the showURL setting is enabled. This exposure can lead to misuse of these credentials against monitored services, potentially compromising the confidentiality of those services. There is no indication of impact on integrity or availability. No known exploits in the wild have been reported.
Mitigation Recommendations
Upgrade Checkmate to version 3.9.2 or later, where this vulnerability is fixed. Until then, avoid enabling the global showURL setting to prevent exposure of sensitive credentials via the unauthenticated API endpoint.
CVE-2026-71862: CWE-200: Exposure of Sensitive Information to an Unauthorized Actor in bluewave-labs Checkmate
Description
Checkmate versions 3.3.0 through 3.9.1 have a vulnerability where enabling the global showURL setting causes an unauthenticated API endpoint to expose sensitive authorization credentials. Specifically, the GET /api/v1/status-page/:url endpoint returns monitor objects including a secret field used for HTTP authorization. This allows unauthorized actors to extract credentials from the JSON response. The issue is fixed in version 3.9.2.
CVSS v3.1
Score 7.5high
Affected software
pkg:github/bluewave-labs/CheckmateRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
In Checkmate, an open-source server monitoring tool, versions from 3.3.0 up to but not including 3.9.2 have a security flaw triggered by enabling the global showURL setting. This flaw causes the unauthenticated GET /api/v1/status-page/:url endpoint to return full monitor objects containing a secret field used as an HTTP Authorization credential. Although the frontend does not display this secret, it is present in the JSON response, enabling unauthorized users to obtain sensitive credentials and potentially misuse them against monitored services. The vulnerability is identified as CWE-200 (Exposure of Sensitive Information) and CWE-522 (Insufficiently Protected Credentials). The vulnerability has a CVSS 3.1 score of 7.5 (high severity) and is fixed in version 3.9.2.
Potential Impact
Unauthorized actors can retrieve sensitive HTTP Authorization credentials from the unauthenticated API endpoint when the showURL setting is enabled. This exposure can lead to misuse of these credentials against monitored services, potentially compromising the confidentiality of those services. There is no indication of impact on integrity or availability. No known exploits in the wild have been reported.
Mitigation Recommendations
Upgrade Checkmate to version 3.9.2 or later, where this vulnerability is fixed. Until then, avoid enabling the global showURL setting to prevent exposure of sensitive credentials via the unauthenticated API endpoint.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-08-07T18:26:53.524Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a8893f9acd9273b4983fd51
Added to database: 08/21/2026, 18:07:53 UTC
Last enriched: 08/21/2026, 19:37:14 UTC
Last updated: 08/21/2026, 19:37:14 UTC
Views: 6
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