Court filing hid an AI prompt-injection attack, plaintiff caught

A self-represented plaintiff in a Connecticut court embedded a hidden AI prompt-injection instruction in a legal filing, apparently to influence an AI system reviewing the document, according to Tom's Hardware. The attempt was discovered due to unusual whitespace patterns, and the plaintiff has been barred from electronic filing.

Why it matters: This is a concrete real-world instance of prompt injection moving from a theoretical security concern to an attempted courtroom exploit, underscoring that AI-assisted document review pipelines increasingly used across legal and government workflows need robust input sanitization, not just model-level defenses.