CVE-2026-27955 MEDIUM

CVE-2026-27955: Coolify: Command Injection via Single-Quote Breakout in `executeInDocker()`

Vendor Coollabsio
Product coolify
Weakness CWE-78
Published June 30, 2026
Last update June 30, 2026

CVSS base score

6.6/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction None
Confidentiality Low
Integrity Low

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:L

What the vulnerability does

01Description

Coolify is an open-source and self-hostable tool for managing servers, applications, and databases. Prior to 4.0.0-beta.464, the executeInDocker() helper wraps commands in bash -c '{$command}' without escaping single quotes. User-controlled docker_compose_custom_build_command and docker_compose_custom_start_command fields are interpolated directly, allowing a single quote to break out of the bash -c argument and execute commands on the managed server host (outside the intended Docker container context). This vulnerability is fixed in 4.0.0-beta.464.

Key dates

02Disclosure timeline

June 30, 2026 CVE published
June 30, 2026 Record updated