CVE-2025-59156
8.8 HIGH
📋 TL;DR
This vulnerability allows low-privileged users in Coolify to inject malicious Docker Compose directives during project creation or updates. By mounting the host filesystem through a crafted service, attackers can execute arbitrary commands with root privileges on the host operating system, bypassing container isolation. All Coolify instances running vulnerable versions are affected.
💻 Affected Systems
Products:
- Coolify
Versions: All versions prior to 4.0.0-beta.420.7
Operating Systems: All platforms running Docker
Default Config Vulnerable:
⚠️ Yes
Notes: Requires user authentication but only low-privileged member access is sufficient for exploitation.
📦 What is this software?
Coolify by Coollabs
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⚠️ Risk & Real-World Impact
Worst Case
Complete host compromise with root-level access, allowing data theft, lateral movement, persistence establishment, and potential compromise of other containers or systems on the network.
Likely Case
Unauthorized access to host system, data exfiltration, deployment of malicious containers, and potential cryptocurrency mining or ransomware deployment.
If Mitigated
Limited impact if proper network segmentation, least privilege access, and monitoring are in place, though host compromise risk remains.
🌐 Internet-Facing: HIGH
🏢 Internal Only: HIGH
🎯 Exploit Status
Public PoC:
✅ No
Weaponized:
LIKELY
Unauthenticated Exploit:
✅ No
Complexity:
LOW
Exploitation requires authenticated access but is straightforward for attackers with basic Docker knowledge.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.0.0-beta.420.7
Vendor Advisory: https://github.com/coollabsio/coolify/security/advisories/GHSA-h5xw-7xvp-xrxr
Restart Required: Yes
Instructions:
1. Backup your Coolify configuration and data. 2. Update Coolify to version 4.0.0-beta.420.7 or later using your deployment method (Docker, manual, etc.). 3. Restart the Coolify service. 4. Verify the update was successful.
🔧 Temporary Workarounds
Restrict User Permissions
allTemporarily remove project creation/update permissions from low-privileged users until patching is complete.
Docker Socket Protection
linuxRestrict access to Docker socket and implement Docker security best practices.
sudo chmod 660 /var/run/docker.sock
sudo chown root:docker /var/run/docker.sock
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Coolify instances from critical systems
- Enable comprehensive logging and monitoring for suspicious Docker Compose activities
🔍 How to Verify
Check if Vulnerable:
Check Coolify version in web interface or via API. If version is below 4.0.0-beta.420.7, the system is vulnerable.Check Version:
docker exec coolify cat /app/package.json | grep versionVerify Fix Applied:
Confirm version is 4.0.0-beta.420.7 or higher and test that Docker Compose directive injection is no longer possible.📡 Detection & Monitoring
Log Indicators:
- Unusual Docker Compose configurations with host mounts
- Suspicious service definitions in project creation logs
- Unexpected container creations with privileged options
Network Indicators:
- Unexpected outbound connections from Coolify host
- Traffic to known malicious IPs or domains
SIEM Query:
source="coolify" AND ("docker-compose" OR "volume" OR "mount") AND ("host" OR "/" OR "privileged")