RCE in Coollabsio Coolify
CVE-2026-42201
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.
Vulnerability class: Command Injection (OS Command Injection)
EPSS: 0.002 (9.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 3.3 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N.
Affected products
- Coollabsio Coolify — versions < 4.0.0-beta.474
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
- security-advisories@github.com (x_refsource_MISC)
Frequently asked questions
- What is CVE-2026-42201?
- CVE-2026-42201 is a low-severity vulnerability in Coollabsio Coolify, classified under OS Command Injection. CVSS score: 3.3/10. Published 2026-07-07.
- How severe is CVE-2026-42201?
- Low severity. CVSS v3 base score is 3.3 out of 10.