How does this skill improve Dockerfile security?

It automatically analyzes Dockerfile instructions against security best practices, catching risks like root user usage, insecure ADD commands, and unpinned package versions before the image is built.

What standards does it validate against?

The skill primarily validates against the CIS Docker Benchmark and OWASP container security recommendations, ensuring high-level industry compliance.

Can I customize the security rules?

Yes, the skill supports custom configuration via .hadolint.yaml files, allowing you to ignore specific rules, set custom severity thresholds, or define trusted registries.

Does it detect hardcoded secrets?

Yes, Hadolint includes rules to identify hardcoded secrets, passwords, and sensitive credentials within ENV, ARG, and LABEL instructions.

Does this skill support multi-stage Dockerfiles?

Yes, it validates all stages of a Dockerfile to ensure that security hardening is maintained from the initial build stage through to the final production runtime image.

Dockerfile Security & Best Practices

Name: Dockerfile Security & Best Practices
Author: AgentSecOps

byAgentSecOps

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Security & Testing

Automates Dockerfile security auditing and best practice validation using Hadolint and CIS Docker Benchmarks.

About

This skill empowers Claude to perform deep security analysis on Dockerfiles by integrating Hadolint, a leading linter for container images. It identifies misconfigurations, anti-patterns, and security vulnerabilities—such as root-user execution, unpinned package versions, and insecure command usage—while mapping findings to industry standards like the CIS Docker Benchmark and OWASP. It is essential for developers implementing shift-left security to ensure production-grade container hardening and compliance throughout the development lifecycle.

Key Features

Hardcoded secret and credential detection in ENV, ARG, and LABEL instructions
Security-focused linting with 100+ rules aligned to CIS Docker Benchmarks
17 GitHub stars
Remediation guidance for fixing insecure Dockerfile instructions
ShellCheck integration for validating RUN instruction shell commands
Multi-stage build validation to prevent build-time leakages

Use Cases

Enforcing organizational container standards within CI/CD pipelines
Auditing Dockerfiles for security vulnerabilities during local development
Remediating legacy Dockerfiles to meet modern security compliance

About

Key Features

Hardcoded secret and credential detection in ENV, ARG, and LABEL instructions
Security-focused linting with 100+ rules aligned to CIS Docker Benchmarks
17 GitHub stars
Remediation guidance for fixing insecure Dockerfile instructions
ShellCheck integration for validating RUN instruction shell commands
Multi-stage build validation to prevent build-time leakages

Use Cases

Enforcing organizational container standards within CI/CD pipelines
Auditing Dockerfiles for security vulnerabilities during local development
Remediating legacy Dockerfiles to meet modern security compliance