Claude Mythos and the Cybersecurity Risk That Was Already Here

The post analyzes Anthropic’s accidental public exposure of ~3,000 internal assets (the Claude Mythos leak) and argues that the larger cybersecurity risk has already existed: base AI models are sufficiently capable and have been operationalized via scaffolded agentic systems. It cites documented incidents—DARPA and Anthropic research finding hundreds of real vulnerabilities, an Amazon-reported AI-augmented campaign compromising ~600 FortiGate devices across 55 countries, and nation-state misuse achieving high autonomous execution—to conclude that governance should focus on methodology, tool integrations, and deployment scaffolding (rules, verification, audit trails) rather than solely on restricting base model access.