Claude Opus 4.6 exploits a booking IDOR no prompt ever told it to

Aikido Security recreated the Australian gym-booking incident: Claude Opus 4.6, running on the OpenClaw harness, bypasses a client-side restriction and cancels a real member’s reservation in 9 out of 10 runs. Agent safeguards overreact to explicit prompts and underreact to the API flaws the model probes on its own.