CVE-2026-42204: Coollabsio Coolify

High severity, CVSS 8.8. EPSS: 0.7% chance of exploitation in the next 30 days.

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.

Affected products

• Coollabsio Coolify: from 4.0.0-beta.471, before 4.0.0-beta.474 (fixed in 4.0.0-beta.474)

Published 2026-07-06. Last modified 2026-07-07.