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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Fixes

Solution

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History

Fri, 20 Mar 2026 22:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Fri, 20 Mar 2026 18:00:00 +0000

Type Values Removed Values Added
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. 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.
Title Mass Assignment Privilege Escalation in Checkmate
Weaknesses CWE-269
CWE-285
References
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-03-20T21:27:29.683Z

Reserved: 2026-03-09T17:41:56.078Z

Link: CVE-2026-31836

cve-icon Vulnrichment

Updated: 2026-03-20T21:27:22.786Z

cve-icon NVD

Status : Received

Published: 2026-03-20T18:16:13.540

Modified: 2026-03-20T18:16:13.540

Link: CVE-2026-31836

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

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Weaknesses