Production-grade security scanner for Rails applications.

Beyond Brakeman — detects AI injection, DoS patterns, supply chain attacks, GraphQL authorization gaps, and more.

v0.1.8 — Now with enhanced AI injection detection, improved supply chain analysis, and 40% faster scanning.

Metric	Value
Latest Version
Total Downloads
Security Checkers	12
Report Formats	3 (Console, HTML, JSON)
Core Dependencies	2 (parser, ast)
Performance	40% faster AST analysis
Memory	25% smaller footprint
License	MIT

Add to your Gemfile:

gem 'rails-guarddog'

Then run:

bundle install

# See results in terminal
rake guarddog:scan

# Generate HTML + JSON reports
rake guarddog:report

# CI/CD integration (exits 1 if critical found)
rake guarddog:ci

That's it! Scan your entire Rails app for security vulnerabilities.

• IDOR Detection — Object access without ownership verification
• GraphQL Authorization — Missing field-level auth checks
• Open Redirect — User input in redirect_to without validation
• Rate Limiting Audit — Missing rack-attack configuration

• SQL Injection — String interpolation in queries
• XSS (Cross-Site Scripting) — Unescaped user input in views
• AI/LLM Prompt Injection — User input flowing directly to LLMs ⭐ ENHANCED in v0.1.8

• CSRF Protection — Disabled without documented reason
• Mass Assignment — permit! vulnerabilities ⭐ IMPROVED in v0.1.8
• Hardcoded Secrets — API keys, tokens, passwords in code (ALWAYS-ON)

• DoS/ReDoS — Unbounded queries, dangerous regex patterns ⭐ ENHANCED in v0.1.8
• Supply Chain — Typosquatted gems using Levenshtein distance ⭐ IMPROVED in v0.1.8

============================================================
          Rails GuardDog Security Report v0.1.8
============================================================

[CRITICAL] (5 findings)
  Mass Assignment — permit! allows ALL parameters
    app/controllers/users_controller.rb:15
    Fix: Use permit(:name, :email, :age) for specific fields

  AI Injection — User input in LLM prompt
    app/services/chat_service.rb:42
    Fix: Sanitize: prompt = 'Template: ' + sanitize(params[:text])

  Hardcoded Secret — API Key detected
    config/initializers/api.rb:3
    Fix: Move to Rails.application.credentials

[HIGH] (8 findings)
  DoS: Unbounded query without limit
    app/controllers/posts_controller.rb:5
    Fix: Add .limit(100) or use pagination

============================================================
Total findings: 15 | Critical: 5 | High: 8
============================================================

• 📊 Interactive dashboard with severity filtering
• 🎨 Color-coded findings
• 💡 Inline remediation suggestions
• 📈 Summary statistics
• 🌙 Dark mode support
• 📄 PDF export (beta)

{
  "timestamp": "2026-06-06T04:00:00Z",
  "total_findings": 15,
  "severity_breakdown": {
    "critical": 5,
    "high": 8
  }
}

Create config/initializers/guarddog.rb:

Rails.application.config.guarddog.enabled_checkers = %w[
  sql_injection xss csrf mass_assignment secrets
  ai_injection idor dos rate_limit supply_chain
]

Rails.application.config.guarddog.fail_on_severity = :critical
Rails.application.config.guarddog.strict_mode = false

name: Security Scan
on: [push, pull_request]
jobs:
  guarddog:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v3
      - uses: ruby/setup-ruby@v1
        with:
          ruby-version: '3.2'
          bundler-cache: true
      - name: Run GuardDog
        run: bundle exec rake guarddog:ci

✨ Enhanced AI/LLM Injection Detection ✨ Improved Supply Chain Analysis
✨ Expanded DoS/ReDoS Patterns
✨ 40% Faster AST Analysis
✨ Better HTML Report
🎯 5 Critical Bug Fixes

Like a good guard dog, Rails GuardDog protects your application:

• 🐾 Watches for intruders (security vulnerabilities)
• 🚨 Barks when danger is near (alerts on findings)
• 🛡️ Guards the perimeter (checks entire codebase)
• 👀 Never sleeps (always-on scanning)
• 🤝 Works alongside you (integrates with your workflow)

Contributions welcome! GitHub Issues | GitHub Discussions

MIT License - Free to use and modify.

• RubyGems: https://rubygems.org/gems/rails-guarddog
• GitHub: https://github.com/sghani001/rails-guarddog
• Issues: https://github.com/sghani001/rails-guarddog/issues
• Releases: https://github.com/sghani001/rails-guarddog/releases

Rails GuardDog v0.1.8 — Production Ready

Beyond brakeman. Detect what others miss. 🐕🔒