
What an IDOR Bug Looks Like From the Inside: A Bug Bounty Walkthrough That Will Change How You Use Web Apps
Insecure Direct Object Reference (IDOR) is one of the most common and most damaging classes of web vulnerability in 2026. It is also one of the easiest to find. Here is how an IDOR is discovered from a bug bounty hunter's perspective, what it tells you about the apps you use every day, and how to protect yourself when developers get it wrong.