Authenticated superadmin escalation via raw profile update
Published Mar 20, 2026 · Updated Mar 20, 2026
Mass assignment in BlueWave Labs Checkmate 3.5.1 and earlier allows remote authenticated users to gain superadmin access. The editUser function validates the PATCH /api/v1/auth/user body with Zod but discards the parsed result and passes raw req.body to MongoDB $set, so a role field survives schema stripping. Any valid low-privilege account can alter its own role without user interaction, exposing all users, sensitive system data, and critical configuration to the new superadmin.
Summary
What happened
Mass assignment in BlueWave Labs Checkmate 3.5.1 and earlier allows remote authenticated users to gain superadmin access. The editUser function validates the PATCH /api/v1/auth/user body with Zod but discards the parsed result and passes raw req.body to MongoDB $set, so a role field survives schema stripping. Any valid low-privilege account can alter its own role without user interaction, exposing all users, sensitive system data, and critical configuration to the new superadmin.
The record
- CVE
- CVE-2026-31836
- Published
- Mar 20, 2026
- Updated
- Mar 20, 2026
- Vendor
- BlueWave Labs
- Product
- Checkmate
- Classifications
- CWE-285, CWE-269, T1098
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Mar 20, 2026CVE publishedPublication date reported by the CVE source.
- Mar 20, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=<= 3.5.1
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- GHSA-6368-x7wr-wpm2 proof of conceptproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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