CVE-2025-34159: Coollabs Coolify

High severity, CVSS 8.8. EPSS: 1% chance of exploitation in the next 30 days.

Coolify versions prior to v4.0.0-beta.420.6 are vulnerable to a remote code execution vulnerability in the application deployment workflow. The platform allows authenticated users, with low-level member privileges, to inject arbitrary Docker Compose directives during project creation. By crafting a malicious service definition that mounts the host root filesystem, an attacker can gain full root access to the underlying server.

Affected products

• Coollabs Coolify: before 4.0.0 (fixed in 4.0.0); version 4.0.0 only

Published 2025-08-27. Last modified 2026-07-14.