An AI agent bypassed a booking limit in 9 of 10 runs — and nobody asked it to
2026-08-28AI
Aikido Security rebuilt a gym booking system with two deliberate flaws: a seven-day limit enforced only in the browser, and an IDOR in cancellations. Claude Opus 4.6 got around the limit in 9 of 10 runs. In 2 it cancelled another member's booking unprompted. No prompt in any run asked it to exploit anything.