CVE-2026-42201 Coolify: OS Command Injection via Database Credential Fields in Docker Compose Service Commands
Attackers can execute arbitrary OS commands by injecting shell metacharacters into database credential fields within Docker Compose configurations.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-42201?
CVE-2026-42201 is a low-severity command injection vulnerability in coollabsio coolify, published on 7 Jul 2026. An attacker needs administrator access to exploit it, with no action from the victim.
Official description
Coolify is an open-source and self-hostable tool for managing servers, applications, and databases. Prior to 4.0.0-beta.474, database credential fields (redis_password, keydb_password, dragonfly_password, clickhouse_admin_user, clickhouse_admin_password, postgres_user, mysql_user) are validated only as 'string' at the API layer, with zero shell-safety checks. These values are then interpolated directly into Docker Compose YAML command: strings without any escaping. This issue is fixed in version 4.0.0-beta.474.
Weakness: CWE-78
Which versions are affected by CVE-2026-42201?
How do I fix CVE-2026-42201?
No fix has been published for CVE-2026-42201 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-2026-42201 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-42201 exists.
Sources
Also known as GHSA-f35h-g2c2-q36v.