Hidden Prompt Injection in Brazilian Labor-Court Petition Reportedly Tried to Manipulate Galileu
Galileu, an AI tool used by Brazil's labor courts, reportedly detected hidden instructions embedded in an initial petition before the 3rd Labor Court of Parauapebas. The text allegedly told the AI to contest the petition superficially and not challenge documents. Galileu reportedly alerted the judge and blocked the hidden content from processing; the judge then reviewed the material before imposing any procedural consequences.
- Date it happened
- 2026-05-13
- Organisation involved
- Conselho Superior da Justiça do Trabalho, Tribunal Regional do Trabalho da 8ª Região, 3ª Vara do Trabalho de Parauapebas, Judicial system of Brazil, Brazilian labor courts
- Product, system or model
- Galileu, AI-assisted legal document analysis systems
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