Threat
Brazil Court Sanctions Lawyers for Prompt Injection in Filing
Publication date unknown · Discovered jetstream.security
Page published
Publication date unknown · First observed: 1 Nov 2026
Coverage timeline
Single-source incident — one report is available.
Why it matters
The concealed court-filing instructions demonstrate a real-world attempt to turn externally supplied legal documents into commands that manipulate AI-assisted judicial review.
A Brazilian labor court fined two lawyers for embedding a white-on-white prompt injection in a court filing, instructing AI reviewers to examine the petition superficially and avoid challenging its documents regardless of other commands. The court’s Galileu AI tool identified the concealed text; the supplied report does not establish that the injection successfully influenced a review.