Authorization code interception is the theft or capture of an OAuth authorization code before the legitimate client redeems it. It matters because whoever redeems the code first may obtain tokens and access that were never meant for them.
What is Authorization Code Interception?
Interception can happen through weak redirect handling, malicious apps, browser or network abuse, or misconfigured clients. Modern protections like PKCE exist largely to reduce the value of intercepted codes.
What Authorization Code Interception Commonly Supports
Common uses include OAuth hardening, mobile app security, redirect review, and authorization flow design.
Authorization Code Interception vs. Protected Authorization Code Flow
Authorization code interception steals the temporary code in transit or at redirection time. Protected flows make a stolen code much harder to redeem successfully.
Frequently Asked Questions
Why are intercepted codes dangerous?
Because they can be exchanged for tokens that grant actual access, often without the victim noticing immediately.
Does PKCE help?
Yes. PKCE makes intercepted codes far less useful if implemented correctly and enforced consistently.
