CVE-2026-31836
Last modified
CVE-2026-31836 is a high-severity vulnerability rated 8.1/10 on the CVSS scale. 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. EPSS estimates a 0.29% chance of exploitation in the next 30 days.
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Bluewavelabs | Checkmate | <= 3.5.1 |
References
- https://github.com/bluewave-labs/Checkmate/security/advisories/GHSA-6368-x7wr-wpm2Exploit, Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
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