Mythos Got Loose — Why AI Agent Security Needs More Than Access Control

Yesterday, TechCrunch and Bloomberg reported that unauthorized users gained access to Claude Mythos Preview — Anthropic's restricted AI model capable of autonomously discovering zero-day vulnerabilities across every major operating system and web browser. The security community is focused on how the breach happened. That's the right first question. But there's a bigger question nobody is asking: what happens when a powerful AI agent processes input it shouldn't trust? What happened April 7, 2026