CVE-2025-64421 Coolify has a privilege escalation - low privileged user can invite themselves as an admin user

High 8.7 Published 5 Jan 2026 Updated 5 Jan 2026

A low-privileged user can escalate to administrator by exploiting a race condition in the invitation process, allowing full system takeover.

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-2025-64421?

CVE-2025-64421 is a high-severity vulnerability in coollabsio coolify, published on 5 Jan 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Coolify is an open-source and self-hostable tool for managing servers, applications, and databases. In Coolify versions up to and including v4.0.0-beta.434, a low privileged user (member) can invite a high privileged user. At first, the application will throw an error, but if the attacker clicks the invite button a second time, it actually works. This way, a low privileged user can invite themselves as an administrator to the Coolify instance. After the high privileged user is invited, the attacker can initiate a password reset and log in with the new admin. As of time of publication, it is unclear if a patch is available.

Weakness: CWE-863

Which versions are affected by CVE-2025-64421?

It affects 1 product.

Products include Coollabs Coolify.

How do I fix CVE-2025-64421?

No fix has been published for CVE-2025-64421 yet. Limit exposure of the affected software until one is available.

Is CVE-2025-64421 being exploited?

There is no known exploitation of CVE-2025-64421 in the wild and no public exploit code.

Sources

Also known as GHSA-4p6r-m39m-9cm9.