Docker Socket Exposed to Container

CRITICAL

Service mounts Docker socket. The owner of this socket is root. Giving container access to it is equivalent to giving unrestricted root access to host.

Rule Information

Language
Docker Compose
Category
Security
Author
Code Pathfinder
Last Updated
2026-01-17
Tags
docker-composecomposedocker-socketvolumesecurityprivilege-escalationcontainer-escapedaemoncriticalhost-access
CWE References
CWE-250

Interactive Playground

Experiment with the vulnerable code and security rule below. Edit the code to see how the rule detects different vulnerability patterns.

pathfinder ci --ruleset docker-compose/COMPOSE-SEC-002 --project .
Vulnerable Code
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Security Rule

Similar Rules

Explore related security rules for Docker Compose

MEDIUM

Using Host IPC Mode

Service uses host IPC namespace. Container shares inter-process communication with host.

MEDIUM

Missing no-new-privileges Security Option

Service does not have 'no-new-privileges:true' in security_opt. This allows

MEDIUM

SELinux Separation Disabled

Service has 'label:disable' in security_opt, which disables SELinux mandatory

Frequently Asked Questions

Common questions about Docker Socket Exposed to Container

Service mounts Docker socket. The owner of this socket is root. Giving container access to it is equivalent to giving unrestricted root access to host.
This vulnerability is rated as CRITICAL severity, which means it requires immediate attention and can lead to severe security breaches such as remote code execution, complete system compromise, or massive data breaches.

Use Code Pathfinder to scan your Docker Compose codebase and automatically detect instances of this vulnerability pattern. Install Code Pathfinder and run the following command in your project directory:

pathfinder ci --ruleset docker-compose/COMPOSE-SEC-002 --project .

This rule is aligned with industry-standard security frameworks and classifications:

  • CWE (Common Weakness Enumeration): CWE-250
  • Tags: docker-compose, compose, docker-socket, volume, security, privilege-escalation, container-escape, daemon, critical, host-access
Yes! Code Pathfinder allows you to customize rules to match your specific security requirements and coding standards. You can modify the detection patterns, adjust severity levels, add custom sanitizers, and configure the rule to fit your organization's security policies. The interactive playground above lets you experiment with the rule and see how it behaves with different code patterns.
When this vulnerability is detected in your code, review the flagged instances carefully. Check the "Vulnerable Code" section above for examples of insecure patterns and the "Security Rule" section to understand what the rule is looking for. Follow security best practices for Docker Compose and consult the CWE/CVE references for detailed remediation guidance. Always test your fixes thoroughly before deploying to production.
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