CVE-2026-42204 Coolify: Authenticated RCE via SHELL_SAFE_COMMAND_PATTERN regression → host root
Authenticated users can inject shell commands via Docker Compose fields to execute code as root on the host.
- 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-2026-42204?
CVE-2026-42204 is a high-severity command injection vulnerability in coollabsio coolify, published on 6 Jul 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. From 4.0.0-beta.471 through 4.0.0-beta.473, a regression in SHELL_SAFE_COMMAND_PATTERN allowed ampersands in custom Docker Compose build, start, and pre/post-deployment command fields, allowing an authenticated team member to inject shell commands that execute on the host. This issue is fixed in version 4.0.0-beta.474.
Weakness: CWE-78
Which versions are affected by CVE-2026-42204?
How do I fix CVE-2026-42204?
No fix has been published for CVE-2026-42204 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-42204 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-42204 exists.
Sources
Also known as GHSA-chg4-63hm-xv9x.