00 — Overview
Race Conditions
Learn how sending simultaneous requests exploits TOCTOU flaws — redeeming coupons multiple times, buying out-of-stock items, and bypassing rate limits.
Intermediate·45 min·5 tasks
// By the end of this module
→Understand TOCTOU vulnerabilities and why timing creates exploitable windows
→Exploit race conditions to bypass single-use limits and discount codes
→Use concurrent requests to trigger double-spend and limit bypass
→Detect race condition vulnerabilities in transactional endpoints