Microsoft Hacked to Deliver Malware to Claude and Gemini Users
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Cybersecurity<br>Microsoft Hacked to Deliver Malware to Claude and Gemini Users
Joseph Cox
Jun 8, 2026<br>at 11:50 AM
Microsoft took the highly unusual step of shutting down more than 70 of its own GitHub repositories after hackers pushed malware that would steal credentials from AI coding agent users.
Photo by Simon Ray on Unsplash.
Microsoft has shut down a wave of its own repositories on GitHub, including those related to Azure and AI coding agents, as it investigates a data breach, according to research from cybersecurity researchers and a statement given to 404 Media by Microsoft. Hackers planted malware that would harvest peoples’ credentials when they opened it in AI coding tools like Claude Code or Gemini CLI, according to one set of researchers.<br>The exact contours of the breach are unclear, but researchers say Microsoft has disabled more than 70 of its own repositories, and pointed to a particular package that was previously compromised.
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