# Anthropic says its cybersecurity initiative Project Glasswing has helped uncover more than 10,000 high- and critical-severity software vulnerabilities.

*genai · news · 2026-05-22 · Interesting Engineering*

## Key points

- Anthropic's Claude Mythos Preview model uncovered over 10,000 high- or critical-severity vulnerabilities in one month.
- In testing, Mozilla found 271 vulnerabilities in Firefox 150 using Mythos Preview, over ten times previous rates.
- Security firms confirmed 90.6% validity for 1,752 high- or critical-severity open-source vulnerabilities flagged by Mythos Preview.
- Project Glasswing partners now face an industry bottleneck: patching workflows can't keep up with automated discovery rates.
- Some open-source maintainers have requested Anthropic slow vulnerability disclosures due to limited capacity for rapid fixes.

**Companies:** Anthropic, Cloudflare, Palo Alto Networks, Oracle, Mozilla

[Read the full story on Interesting Engineering](https://interestingengineering.com/ai-robotics/anthropic-project-glasswing-10000-software-vulnerabilities)

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