What AI 'fingerprints' helped expose the 1st AI-made zero-day exploit?

Google said it has, for the first time, found hackers using AI to find a zero-day vulnerability (unknown security flaw). An abundance of educational docstrings, hallucinated CVSS score and textbook-like Python formatting helped the researchers confirm the AI use in the code. "It's...closest thing yet to a fingerprint at...crime scene," US National Security Agency's ex-cybersecurity director said.