Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Bluewavelabs | Checkmate | <= 3.5.1 |
Related Weaknesses (CWE)
References
- https://github.com/bluewave-labs/Checkmate/security/advisories/GHSA-6368-x7wr-wpExploitVendor Advisory
FAQ
What is CVE-2026-31836?
CVE-2026-31836 is a vulnerability with a CVSS score of 8.1 (HIGH). 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 an...
How severe is CVE-2026-31836?
CVE-2026-31836 has been rated HIGH with a CVSS base score of 8.1/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-31836?
Check the references section above for vendor advisories and patch information. Affected products include: Bluewavelabs Checkmate.