Dependency Auditor Skill

Dependency Auditor Skill

Automatic dependency vulnerability checking.

When I Activate

• ✅ package.json modified
• ✅ requirements.txt changed
• ✅ Gemfile or pom.xml modified
• ✅ User mentions dependencies or vulnerabilities
• ✅ Before deployments
• ✅ yarn.lock or package-lock.json changes

What I Check

Dependency Vulnerabilities

• Known CVEs in packages
• Outdated dependencies with security fixes
• Malicious packages
• License compatibility issues
• Deprecated packages

Package Managers Supported

• Node.js: npm, yarn, pnpm
• Python: pip, pipenv, poetry
• Ruby: bundler
• Java: Maven, Gradle
• Go: go modules
• PHP: composer

Example Alerts

NPM Vulnerability

# You run: npm install lodash

# I automatically audit:
🚨 HIGH: Prototype Pollution in lodash
📍 Package: [email protected]
📦 Vulnerable versions: < 4.17.21
🔧 Fix: npm update lodash
📖 CVE-2020-8203
   https://nvd.nist.gov/​vuln/​detail/​CVE-2020-8203

Recommendation: Update to [email protected] or higher

Python Vulnerability

# You modify requirements.txt: django==2.2.0

# I alert:
🚨 CRITICAL: Multiple vulnerabilities in Django 2.2.0
📍 Package: [email protected]
📦 Vulnerable versions: < 2.2.28
🔧 Fix: Update requirements.txt to Django==2.2.28
📖 CVEs: CVE-2021-33203, CVE-2021-33571

Affected: SQL injection, XSS vulnerabilities
Recommendation: Update immediately to [email protected]+

Multiple Vulnerabilities

# After npm install:
🚨 Dependency audit found 8 vulnerabilities:
  - 3 CRITICAL
  - 2 HIGH
  - 2 MEDIUM
  - 1 LOW

Critical issues:
  1. [email protected] - SSRF vulnerability
     Fix: npm install axios@latest

  2. [email protected] - Prototype pollution
     Fix: npm install ajv@^8.0.0

  3. [email protected] - Information disclosure
     Fix: npm install node-fetch@^2.6.7

Run 'npm audit fix' to automatically fix 6/​8 issues

Automatic Actions

On Dependency Changes

1. Detect package manager (npm, pip, etc.)
2. Run security audit command
3. Parse vulnerability results
4. Categorize by severity
5. Suggest fixes
6. Flag breaking changes

Audit Commands

# Node.js
npm audit
npm audit --json  # Structured output

# Python
pip-audit
safety check

# Ruby
bundle audit

# Java (Maven)
mvn dependency-check:check

Severity Classification

CRITICAL 🚨

• Remote code execution
• SQL injection
• Authentication bypass
• Publicly exploitable

HIGH ⚠️

• Cross-site scripting
• Denial of service
• Information disclosure
• Wide attack surface

MEDIUM 📋

• Limited impact vulnerabilities
• Requires specific conditions
• Difficult to exploit

LOW 💡

• Minor security improvements
• Best practice violations
• Minimal risk

Fix Strategies

Automatic Updates

# Safe automatic fixes
npm audit fix

# May include breaking changes
npm audit fix --force

Manual Updates

# Check what will change
npm outdated

# Update specific package
npm update lodash

# Major version update
npm install lodash@latest

Alternative Packages

Vulnerable: [email protected] (deprecated)
Alternative: axios or node-fetch
Migration guide: [link]

Integration with CI/​CD

Block Deployments

# .github/​workflows/​security.yml
- name: Dependency audit
  run: |
    npm audit --audit-level=high
    # Fails if HIGH or CRITICAL found

Scheduled Audits

# Weekly dependency check
on:
  schedule:
    - cron: '0 0 * * 0'
jobs:
  audit:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/​checkout@v2
      - run: npm audit

Sandboxing Compatibility

Works without sandboxing: ✅ Yes Works with sandboxing: ⚙️ Needs npm/​pip registry access

Sandbox config:

{
  "network": {
    "allowedDomains": [
      "registry.npmjs.org",
      "pypi.org",
      "rubygems.org",
      "repo.maven.apache.org"
    ]
  }
}

License Checking

I also check license compatibility:

⚠️ License issue: GPL-3.0 package in commercial project
📦 Package: [email protected]
📖 GPL-3.0 requires source code disclosure
🔧 Consider: Find MIT/​Apache-2.0 alternative

Best Practices

1. Regular audits: Run weekly or on every dependency change
2. Update frequently: Keep dependencies current
3. Review breaking changes: Test before major updates
4. Pin versions: Use exact versions in production
5. Audit lock files: Commit and audit lock files

Related Tools

• security-auditor skill: Code vulnerability detection
• @architect sub-agent: Dependency strategy
• /​review command: Pre-deployment security check