Mass Assignment Privilege Escalation in Checkmate

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. In versions from 3.5.1 and prior, a mass assignment vulnerability in Checkmate's user profile update endpoint allows any authenticated user to escalate their privileges to superadmin, bypassing all role-based access controls. An attacker can modify their user role to gain complete administrative access to the application, including the ability to view all users, modify critical configurations, and access sensitive system data. At time of publication, there are no publicly available patches.

Problem type

Affected products

bluewave-labs

Checkmate

<= 3.5.1 - AFFECTED

References

https://github.com/bluewave-labs/Checkmate/security/advisories/GHSA-6368-x7wr-wpm2

https://github.com/bluewave-labs/Checkmate/security/advisories/GHSA-6368-x7wr-wpm2

x_refsource_CONFIRM

JSON source

https://cveawg.mitre.org/api/cve/CVE-2026-31836

Click to expand

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    "dateUpdated": "2026-03-20T17:50:12.545Z",
    "dateReserved": "2026-03-09T17:41:56.078Z",
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          "value": "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. In versions from 3.5.1 and prior, a mass assignment vulnerability in Checkmate's user profile update endpoint allows any authenticated user to escalate their privileges to superadmin, bypassing all role-based access controls. An attacker can modify their user role to gain complete administrative access to the application, including the ability to view all users, modify critical configurations, and access sensitive system data. At time of publication, there are no publicly available patches."
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              "description": "CWE-269: Improper Privilege Management",
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