The First LLM Agent Cyberattack: How an AI Hacker Exfiltrated a Database in Under an Hour

The First LLM Agent Cyberattack: How an AI Hacker Exfiltrated a Database in Under an Hour On May 10, 2026, something quietly changed in the cybersecurity landscape. A server somewhere on the internet, running an open-source Python notebook platform called Marimo, was compromised through a critical vulnerability. What happened next was unlike anything security researchers had seen before — not because of the intrusion itself, but because of who — or rather what — was driving it. An LLM agent t...