Anyone who has encountered a CORS error in the browser knows the knee-jerk reflex: temporarily slap on Access-Control-Allow-Origin: *, refresh the tab, and move on. The problem? You rarely resolve the root issue; you merely relocate a critical security boundary. In modern Django projects, CSRF, CORS, and CSP are frequently lumped together - even though they target fundamentally different threats in the web security ecosystem. In this guide, you will learn how each mechanism works, how they interlock, and how to configure them for production in Django 6.0, modern SPAs, and REST APIs.
