Mythos Found a 27-Year-Old Bug in OpenBSD. Your Code Is Next.

Anthropic's new Mythos Preview surfaced a 27-year-old vulnerability in OpenBSD — the most-audited operating system in commercial software — and generated 181 working Firefox exploits in a benchmark where Claude Opus 4.6 managed two. Eleven organizations are inside the launch cohort. The rest of us aren't, and the next Mythos won't be gated. What Mythos is, in hard numbers On April 7, Anthropic announced Claude Mythos Preview , a frontier general-purpose model with a step-change in computer secur