# CVE-2026-31836: Mass Assignment Privilege Escalation in Checkmate

> CVE-2026-31836: Mass Assignment Privilege Escalation in Checkmate. CVSS 8.1 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-31836
Last updated: 2026-06-17T10:34:32Z

- Published: 2026-03-20 17:50 UTC · Updated: 2026-06-17 10:34 UTC · Assigner: GitHub\_M
- CVSS: 8.1 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
- EPSS: 0.31%, 24th percentile (scored 2026-11-10)
- CISA KEV: no
- CWE: CWE-269, CWE-285

## 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.

## Affected vendors and products

- bluewave-labs: Checkmate

## Tracked companies

- [Google Cloud](https://rewindex.com/company/google-cloud.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-31836)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-31836)
- [https://github.com/bluewave-labs/Checkmate/security/advisories/GHSA-6368-x7wr-wpm2](https://github.com/bluewave-labs/Checkmate/security/advisories/GHSA-6368-x7wr-wpm2)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-31836 · Markdown: https://rewindex.com/cve/CVE-2026-31836.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-31836 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-11-11T04:21:46.001Z