CVE-2026-31836 Mass Assignment Privilege Escalation in Checkmate
Authenticated users can escalate privileges to superadmin via mass assignment in the profile update endpoint, gaining full administrative access.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-31836?
CVE-2026-31836 is a high-severity vulnerability in bluewave-labs Checkmate, published on 20 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-31836?
It affects 1 product.
Products include Bluewavelabs Checkmate.
How do I fix CVE-2026-31836?
No fix has been published for CVE-2026-31836 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-31836 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-31836 exists.
Other vulnerabilities in bluewave-labs Checkmate
Sources
Also known as GHSA-6368-x7wr-wpm2.