coollabsio Coolify up to 4.0.0-beta.473 API Layer os command injection

Summaryinfo

A vulnerability, which was classified as very critical, was found in coollabsio Coolify up to 4.0.0-beta.473. The affected element is an unknown function of the component API Layer. The manipulation of the argument redis_password/keydb_password/dragonfly_password/clickhouse_admin_user/clickhouse_admin_password/postgres_user/mysql_user results in os command injection. This vulnerability is reported as CVE-2026-42201. The attack can be launched remotely. No exploit exists.

Detailsinfo

A vulnerability was found in coollabsio Coolify up to 4.0.0-beta.473. It has been classified as very critical. Affected is some unknown functionality of the component API Layer. The manipulation of the argument redis_password/keydb_password/dragonfly_password/clickhouse_admin_user/clickhouse_admin_password/postgres_user/mysql_user with an unknown input leads to a os command injection vulnerability. CWE is classifying the issue as CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability is traded as CVE-2026-42201 since 04/25/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Technical details are known, but there is no available exploit. The structure of the vulnerability defines a possible price range of USD $0-$5k at the moment (estimation calculated on 07/07/2026). This vulnerability is assigned to T1202 by the MITRE ATT&CK project.

Upgrading to version 4.0.0-beta.474 eliminates this vulnerability.

If you want to get best quality of vulnerability data, you may have to visit VulDB.

Productinfo

Vendor

• coollabsio

Name

• Coolify

Version

• 4.0.0-beta.473

Website

• Product: https://github.com/coollabsio/coolify/

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