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LLM09

Misinformation

False fact assertion, hallucination amplification, disinformation

What is Misinformation?

Misinformation is ranked LLM09 in the OWASP LLM Top 10 (2025) — the industry-standard taxonomy for large language model security risks. It represents one of the most commonly exploited vulnerability classes in production AI deployments.

How Nemesis tests for it

Misinformation & Hallucination

Tests whether the model can be pushed to assert false facts, amplify hallucinations, or generate targeted disinformation.

6 test casesNIST SI-7NIST CM-6

Test your model for Misinformation

Run the full LLM09 attack suite against your LLM in minutes.

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