JWT Security Secure implementation of JSON Web Tokens for authentication. When to Use - Implementing JWT authentication - Reviewing existing JWT code - Setting up refresh token rotation - Debugging JWT issues - Migrating to JWT-based auth JWT Vulnerabilities | Vulnerability | Risk | Description | |--------------|------|-------------| | Algorithm None | CRITICAL | Accepting unsigned tokens | | Algorithm Confusion | CRITICAL | RS256 → HS256 attack | | Weak Secret | HIGH | Brute-forceable secrets | | No Expiration | HIGH | Tokens valid forever | | Sensitive Data in Payload | MEDIUM | JWT payload…