Unrated severityNVD Advisory· Published Jun 30, 2026· Updated Jun 30, 2026
Coolify: Command Injection via Single-Quote Breakout in `executeInDocker()`
CVE-2026-27955
Description
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.
Patches
Vulnerability mechanics
References
1- github.com/coollabsio/coolify/security/advisories/GHSA-6h8g-wpxp-cq98mitrex_refsource_CONFIRM
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