LLMMedium
Hidden Prompt Injection in Brazilian Labor-Court Petition Reportedly Tried to Manipulate Galileu
- Occurred
- May 13, 2026
- Published
- May 13, 2026
- Source
- AI Incident Database
Summary
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.
Developers
- Tribunal Regional do Trabalho da 4ª Região
- Conselho Superior da Justiça do Trabalho
Deployers
- 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
Harmed parties
- Epistemic integrity
- Judicial integrity
- Judicial system of Brazil
- Brazilian labor courts
- Defendants in Brazilian labor cases
Tags
- response
Classification
Category confidence: 90%
Severity confidence: 85%
Rationale: AI tool detected prompt injection attempt in legal document, causing procedural intervention without major harm.
Classifier: Qwen/Qwen3.5-35B-A3B-FP8