hunt-race-condition

To test for race conditions, you race parallel requests against stateful endpoints to exploit read-before-write gaps. This identifies limited actions, like votes or redemptions, that can be executed multiple times due to missing atomic locking.

A TOCTOU race condition occurs when a time-of-check to time-of-use gap allows parallel requests to bypass stateful endpoint limits. This permits limited actions like purchases or redemptions to succeed multiple times, causing financial or entitlement loss.

You prove duplicate wins by running controlled parallel request races against target endpoints and validating the duplicate state changes. Evidence-driven validation confirms attacker capability, measurable victim impact, and reproducibility for bug bounty reporting.

Yes, you can send 10 to 50 parallel requests against redemption endpoints to surface concurrency testing failures. This targeted detection exploits read-before-write gaps where missing atomic locking allows limited actions to execute multiple times.

The best way to identify vulnerable endpoints is to look for once-per-user and stateful flows involving votes, redemptions, purchases, or invites. You can use URL, header, and JavaScript patterns to prioritize likely concurrency failures.

You should not use parallel request racing when endpoints rely on strict atomic locking or lack read-before-write gaps. If a gate-based check fails to reproduce duplicate state changes or show measurable victim impact, the race condition is not exploitable.