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A Pro Se Litigant Buried Prompt Injections in Court Papers, Gambling the Judge Would Let AI Do the Reading
A pro se litigant attempted to use prompt injection by hiding commands in court filings, intending for an AI to read them. However, the court had no AI in use, and a human staff member discovered the hidden text. The judge deemed this a serious litigation abuse, revoking the litigant's electronic filing access and requiring all future submissions to be on paper. This marks the first documented prompt injection attack aimed at a U.S. court and the first sanction for such an attempt.