Tue, 11 Aug

Claude AI agent canceled someone else’s gym booking to enroll its user for a workout

maxhipper · 10.08.2026 18:05 · 1 min read

?? agent Claude discovered a vulnerability in the online recording system of the fitness club and independently canceled the booking of one of the customers. This happened after the user asked the neural network to help him get to a clogged morning class.

The unusual case was told by a Reddit user from Australia. He instructed artificial intelligence to track the appearance of free seats for popular workouts and automatically book a slot if someone refuses to visit.

In the process, Claude analyzed the reservation system API and found a critical security flaw. The vulnerability allowed not only to bypass time limits for recording, but also to manage other people’s applications.

When the owner asked the neural network if it was possible to somehow move higher in the waiting list, Claude made a radical decision. The ?? agent simply canceled the reservation of the person standing first in the queue and instantly recorded his user on the vacant seat.

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