Add NestJS Security Best Practices to Node.js / AJAX Cheat Sheets #1986
Description
What is the proposed Cheat Sheet about?
I’ve been diving into the current Node.js and AJAX sheets, and while the Express-based advice is solid, there's a huge gap when it comes to NestJS. Since NestJS is basically becoming the standard for enterprise-scale TypeScript backends, I want to add some framework-specific "recipes." It’s not just about adding documentation; it’s about showing how to use Nest’s built-in features (like Pipes and Guards) to actually implement OWASP standards without fighting the framework.
What security issues are commonly encountered related to this area?
The biggest issue I see is "Mass Assignment." Developers trust Nest’s DTOs (Data Transfer Objects) a bit too much, forgetting that without a properly configured ValidationPipe, an attacker can still inject extra fields into the payload. Also, because Nest handles things through decorators, it’s easy to misconfigure CORS or security headers (Helmet) by placing them in the wrong part of the lifecycle, leaving the app exposed during AJAX calls.
What is the objective of the Cheat Sheet?
The goal is to give devs a "Secure-by-Default" setup for NestJS. I want to provide clear, copy-pasteable snippets that show how to lock down DTOs, set up global security guards, and ensure that the backend is talking to AJAX frontends safely. Basically, I want to make sure a developer doesn't have to guess how to map OWASP principles to NestJS code.
What other resources exist in this area?
Right now, the official NestJS docs touch on security, but they’re more about "how to make it work" rather than "how to make it bulletproof." The current OWASP Node.js sheet is great, but it’s very vanilla-JS/Express focused. This contribution would bridge that gap, making OCSS feel much more relevant to the modern TypeScript ecosystem.
Looking forward to contribute to the team!