Helmet

Helmet is a popular middleware package for Express and Connect applications, designed to enhance web security by automatically setting various HTTP response headers. The current stable version is 8.1.0, compatible with Node.js 18 and later. Helmet typically releases major versions at a moderate pace, incorporating updates to security best practices and deprecating outdated headers. Its key differentiator is its ease of use, providing a sensible default set of 12 security headers out-of-the-box, including `Content-Security-Policy`, `Cross-Origin-Opener-Policy`, and `Strict-Transport-Security`. While providing robust defaults, Helmet is highly configurable, allowing developers to fine-tune individual header directives or disable specific headers entirely to suit their application's needs, making it a go-to solution for foundational web security in Node.js environments.