Security Metamorphosis: Preparing for the Mythos Era

Anthropic's Project Glasswing and its Mythos Preview model — backed by AWS, Apple, Google, Microsoft, and others — represent a new era where AI can autonomously discover and exploit vulnerabilities at machine speed. The post introduces the concept of being 'Mythos-ready' and outlines a security framework for organizations to prepare. Key recommendations include architectural controls over prompt-based security, least-privilege access, blast-radius limits, human-in-the-loop approvals, high-fidelity logging, kill switches, and separation between reasoning and execution environments. A practical checklist is provided to help organizations assess readiness against autonomous AI-driven attacks capable of chaining multi-step exploits across both legacy and newly written code.