2025 Mistral AI — internal chat logs surfaced via third-party context; company said it was investigating
Data compromised
Business/chat content reflected in leaked logs per press descriptions.
Technical writeup
TechCrunch reported that Mistral AI internal chat logs appeared online and that Mistral stated it was working to identify the source of the leak after a partner-related angle was raised in coverage.
Root cause
Third-party or partner integration path cited in early reporting; full technical attribution remained limited publicly.