Banking AI Vulnerability: How Micro-Transfers Enable Prompt Injection Attacks

This vulnerability exposes a critical architectural flaw in modern AI-powered banking systems that process untrusted user-generated data like transaction descriptions. The attack is elegant and accessible—requiring only a micro-transfer with injected instructions, no malware or device access—making it a realistic threat to millions of banking customers. It demonstrates that indirect prompt injection is not a theoretical concern but an immediate security challenge for any institution deploying LLMs to contextualize external data.