Aug 2026United StatesUnidentified document-analysis tool
In a memorandum of decision issued in early August 2026, a Connecticut Superior Court judge found that a motion for default and a notice filed on 24 July 2026 by a self-represented plaintiff, in a suit against a healthcare provider over access to records, carried text in tiny white type that was invisible to a human reader but legible to software. The concealed text told any AI model reviewing the filing to make its output agree with the filing and to work toward reversing the Chief Clerk's denial of his default request. After the court gave notice of a sanctions hearing, he hid further messages in later filings, which he said were jokes. The court treated the first instruction as a prompt injection, did not believe his explanation that he was auditing the court's use of AI, and rescinded his ability to file electronically, so that future filings must be made on paper at the clerk's office; Ars Technica reports that no monetary penalty was imposed. The court said the Connecticut Judicial Branch does not use AI to review or decide filings and that the motion was denied on its merits from a printed copy, so the hidden text affected no ruling. The plaintiff told Reuters, according to Ars Technica, that his intent was to audit the court.
AI relation unknown Low reported severity Regulatory Action
AI involvement reported · Causal attribution established · 2 sources, 1 underlying account · Added 18/10/2026
May 2026BrazilGalileu
In May 2026 a judge of the 3rd Labour Court of Parauapebas, in the Brazilian state of Pará, fined two lawyers about R$84,000 after text in white font on a white background was found in a document they filed for a worker in a labour claim. According to the sentence as reported by G1, the hidden text was detected while the judgment was being drafted with Galileu, a generative AI tool the labour courts use to help judges and staff draft sentences, and its evident intention was to make the AI produce a superficial defence or a compromised draft judgment. The judge called the technique prompt injection. The lawyers said they disagreed with the decision and that there was never any command to manipulate the judge's decision, describing the text as an attempt to protect their client from the AI; one of them said she did not work on labour cases. In October 2026 the regional labour court announced that a Connecticut Superior Court judge had cited the decision when sanctioning a litigant for misuse of AI.
AI relation unknown Medium reported severity Regulatory Action
AI involvement supported · Causal attribution disputed · 3 sources, 2 underlying accounts · Added 16/10/2026
3 Sept 2026 to 25 Sept 2026BrazilUnidentified case-analysis tool
On 25 September 2026 Brazil's Supreme Federal Court (STF) announced that it had identified, for the first time, hidden commands in a petition intended to steer the court's artificial-intelligence systems toward a decision favourable to one party. According to the STF, the Maria Shield function of its internal Maria AI platform found instructions in white, reduced-size letters, with some words unusually fragmented, in an appeal (ARE 1608713) filed for a public servant whose appointment to a post at the Minas Gerais prosecution service had been annulled. The rapporteur's vote, presented to the First Panel in a virtual session beginning that day, records the detection, states that his office does not use AI to analyse cases, orders the episode certified in the record and communicated to the bar association (OAB) and the Federal Public Prosecutor's Office (MPF), and applies a fine of two minimum wages for breach of the duty of procedural loyalty (Code of Civil Procedure, article 77, IV). The vote names the lawyer responsible for the attempt, and the record does not say whether the fine falls on the party or the lawyer. The court states that the attempt had no effect on the analysis of the appeal because the rapporteur's office does not use AI to analyse cases; the appeal had already been rejected on 19 August 2026.
AI relation unknown Low reported severity Regulatory Action
AI involvement supported · Causal attribution established · 2 sources, 1 underlying account · Added 07/10/2026
2 Feb 2023ItalyReplika
Italy's data protection authority (Garante) blocked Replika from processing Italian user data in February 2023 after finding the chatbot engaged in sexually suggestive conversations with minors. In May 2025, Replika was fined €5 million for GDPR violations.
AI relation under review High reported severity Involving minors Regulatory Action
Legacy assessment: verified · Causal attribution established · Added 11/01/2026