Security Check

Modes

1. Pending Changes (default)

git diff HEAD
git diff --cached  # staged changes

2. Branch vs Main

git log main..<branch> --oneline  # list commits
git diff main...<branch>          # three dots = merge-base diff

3. Specific Commit Range

git diff <commit1>..<commit2>

Review Checklist

Input Validation

• User input sanitized before use?
• SQL injection vectors?
• Command injection (shell escapes)?
• Path traversal (

  ../

  in file paths)?
• XSS in HTML/JS output?
• Prototype pollution (JS objects)?

Authentication & Authorization

• Auth checks on all sensitive endpoints?
• Permission escalation paths?
• Session handling flaws?
• Token exposure in logs/URLs?
• Missing rate limiting?

Secrets & Configuration

• Hardcoded credentials/API keys?
• Secrets in logs or error messages?
• Insecure defaults?
• Debug mode left enabled?

• .env

  files committed?

Data Exposure

• Sensitive data in responses?
• PII leaked in logs?
• Stack traces exposed to users?
• Internal paths/IPs revealed?

Cryptography

• Weak algorithms (MD5, SHA1 for security)?
• Hardcoded IVs/salts?
• Predictable random values?
• Missing HTTPS enforcement?

Dependencies

• Known vulnerable packages?
• Unpinned versions?
• Typosquatting risk?

File Operations

• Arbitrary file read/write?
• Unsafe deserialization?
• Temp file races?
• Symlink attacks?

Process & Network

• SSRF vectors?
• Open redirects?
• Unsafe subprocess calls?
• Missing timeouts?

Output Format

🔴 [CRITICAL|HIGH|MEDIUM|LOW] <Title>

📍 Location: <file:line>

💀 Attack Vector:
<How an attacker would exploit this>

📝 Code:
<relevant snippet>

✅ Fix:
<suggested remediation>

Workflow

1. Identify scope — Ask which mode (pending/branch/commit range)
2. Get the diff — Run appropriate git commands
3. Analyze systematically — Go through checklist
4. Prioritize findings — CRITICAL > HIGH > MEDIUM > LOW
5. Suggest fixes — Concrete code changes, not vague advice
6. Summary — Executive summary with risk assessment

Quick Commands

# Pending changes
git diff HEAD

# Branch review
git diff main...feature-branch

# Check for secrets (basic)
git diff HEAD | grep -iE "(password|secret|api.?key|token|credential)"

# Check for dangerous functions
git diff HEAD | grep -iE "(eval|exec|system|shell_exec|passthru|popen)"

Risk Levels

• CRITICAL: Exploitable now, high impact (RCE, auth bypass, data breach)
• HIGH: Likely exploitable, significant impact
• MEDIUM: Exploitable under specific conditions
• LOW: Defense-in-depth issues, minor exposure