insecure-defaultslisted

# Insecure Defaults Detection Finds **fail-open** vulnerabilities where apps run insecurely with missing configuration. Distinguishes exploitable defaults from fail-secure patterns that crash safely. - **Fail-open (CRITICAL):** `SECRET = env.get('KEY') or 'default'` → App runs with weak secret - **Fail-secure (SAFE):** `SECRET = env['KEY']` → App crashes if missing ## When to Use - **Security audits** of production applications (auth, crypto, API security) - **Configuration review** of deployment files, IaC templates, Docker configs - **Code review** of environment variable handling and secrets management - **Pre-deployment checks** for hardcoded credentials or weak defaults ## When NOT to Use Do not use this skill for: - **Test fixtures** explicitly scoped to test environments (files in `test/`, `spec/`, `__tests__/`) - **Example/template files** (`.example`, `.template`, `.sample` suffixes) - **Development-only tools** (local Docker Compose for dev, debug scripts) - **Documentation examples** in README.md or docs/ directories - **Build-time configuration** that gets replaced during deployment - **Crash-on-missing behavior** where app won't start without proper config (fail-secure) When in doubt: trace the code path to determine if the app runs with the default or crashes. ## Rationalizations to Reject - **"It's just a development default"** → If it reaches production code, it's a finding - **"The production config overrides it"** → Verify prod config exists; code-l