Security guides your team can ship this week

An API without rate limiting is an open invitation for abuse — credential stuffing, scraping, denial of service, and exhausting your database connection pool. This guide covers every practical aspect of implementing rate limiting in Node.js, from a five-line express-rate-limit setup to production-grade Redis-backed distributed limiting.

Using a wildcard CORS policy is one of the most common security mistakes in Node.js APIs. This guide explains what CORS actually does, why * is dangerous when paired with credentials, and how to configure a secure origin allowlist.