dev.to· Oct 23, 2026· by draganristicrsjpg

The agent that charged 312 customers twice, and the one missing field that caused it

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A billing agent retried a payment it had already completed and charged 312 customers a second time. Every individual step was correct. The defect...
🎯 Vulnerability: Web Security Vulnerability
💡 Defense Fix: Implement strict input validation, contextual output encoding, and enforce least-privilege authorization controls.
#ai#agents#llm#security