- Remove CORS origin reflection (SEC-C1 CRITICAL) - Add Content-Security-Policy header (SEC-H2) - Fix rate limiter memory leak with periodic stale IP cleanup (SEC-H5) - Enforce minimum 32-char ENCRYPTION_KEY (SEC-H4) - Validate backup type against allowlist (SEC-M6) - Fix backup download path traversal with path containment check (SEC-C2 CRITICAL)
AES-256-GCM encryption for credential storage, YAML seed config parser with validation, and transactional import into SQLite. Credentials (registry tokens, NPM password) encrypted before storage.