Localhost dangers: CORS and DNS rebinding

What is CORS and how can a CORS misconfiguration lead to security issues? In this blog post, we’ll describe some common CORS issues as well as how you can find and fix them.

By Sonic Mustang · March 16, 2026 · 1 min read

application security
security
github security lab
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Source: The GitHub Blog

What is CORS and how can a CORS misconfiguration lead to security issues? In this blog post, we’ll describe some common CORS issues as well as how you can find and fix them.