Anthropic Mythos Broke Firefox: 271 zero-day vulnerabilities

271 zero-day vulnerabilities. One AI model. One Firefox release. And that's just one of four stories worth your attention this fortnight. If you run engineering, security, or AI at your company, this article will give you a clear message: AI is no longer something your team uses . It's something your team (and your attackers) deploys . Here are the four moves that matter, and the numbers behind each. 1. Mythos found 271 zero-day vulnerabilities in Firefox 150 On April 22, Mozilla shipped Firefox