Claude Discovers Zero-Day in Ghost CMS During Live Conference Demo — 50K-Star Project's First Critical Vulnerability

X/Twitter·high signal

At what appears to be an Anthropic developer event, a live demo showed Claude discovering a zero-day vulnerability in Ghost, the 50,000-star open-source publishing platform that had never had a critical security vulnerability. The tweet documenting the demo hit 8,999 likes and 1.08M views, signaling massive developer interest. This extends Anthropic's February zero-day research (500+ vulnerabilities found in open-source code) into a live, verifiable capability demonstration — the gap between 'research paper' and 'watch it happen in real time' is now closed.