Claude Mythos finds 271 Firefox flaws, Mozilla believes it shifts security toward defenders (opens in new tab)

The Mozilla Foundation tested Claude Mythos, an Anthropic AI model that has stirred debate in the cybersecurity community. Before granting access to Mythos, Mozilla scanned Firefox using Opus 4.6, which led to fixes for 22 security-sensitive bugs in Firefox 148. For instance, Mythos identified 271 vulnerabilities in Firefox 150. Firefox CTO Bobby Holley said other teams are beginning to experience the same “vertigo” that Mozilla felt when the findings first came into focus. “For a … More → Th...