System Card: Claude Mythos Preview [pdf]
Summary
A comprehensive system-card style briefing on Claude Mythos Preview's cybersecurity capabilities, including autonomous vulnerability discovery and exploit development across OpenBSD, FFmpeg, and the Linux kernel. The report details exploit chains, responsible disclosure, and defense-oriented recommendations, arguing for a proactive, model-assisted approach to security while warning of the disruptive potential of such capabilities. It also outlines defensive practices, patching strategies, and governance considerations for defenders and policymakers.