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Anthropic's Project Glasswing: Claude Mythos Found Thousands of Zero-Days (And You Can't Use It)

Anthropic launched Project Glasswing with Apple, Google, Microsoft, and 40+ organizations. Claude Mythos Preview found thousands of zero-day vulnerabilities — including a 27-year-old OpenBSD bug. Here's what it means.

Published April 8, 2026

15 min read

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The Claude Code Source Leak: What 512,000 Lines of Code Revealed

Anthropic accidentally shipped Claude Code's full source in an npm package. Inside: KAIROS daemon mode, undercover mode, frustration detection, fake tools, a Tamagotchi companion, and 44 feature flags.

Anthropic's Project Glasswing: Claude Mythos Found Thousands of Zero-Days (And You Can't Use It)

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The Claude Code Source Leak: What 512,000 Lines of Code Revealed