Anthropic Uncovers 500 Zero-Day Flaws in Open-Source

Axios reports that Anthropic's Claude Opus 4.6 identified about 500 zero-day vulnerabilities across open-source software. Security researchers, including former vuln researcher Thomas Ptacek, say LLMs are well-suited to pattern-driven vulnerability discovery and that well-funded labs can produce such results. The development suggests security teams should take LLM-generated findings seriously and update triage and disclosure workflows.