coollabsio Coolify up to 4.0.0-beta.473 Command Execution os command injection

Summaryinfo

A vulnerability, which was classified as very critical, has been found in coollabsio Coolify up to 4.0.0-beta.473. The impacted element is an unknown function of the component Command Execution Handler. The manipulation leads to os command injection. This vulnerability is traded as CVE-2026-42204. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in coollabsio Coolify up to 4.0.0-beta.473. It has been rated as very critical. This issue affects an unknown functionality of the component Command Execution Handler. The manipulation with an unknown input leads to a os command injection vulnerability. Using CWE to declare the problem leads to 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. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at github.com. The identification of this vulnerability is CVE-2026-42204 since 04/25/2026. The exploitation is known to be easy. The attack may be initiated remotely. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 07/07/2026). The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

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

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Productinfo

Vendor

• coollabsio

Name

• Coolify

Version

• 4.0.0-beta.473

Website

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

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