AI agent incident

CoSnitch flaws let one click pull data out of Microsoft Copilot's connected apps

Reported · 2 sources

What happened

Varonis disclosed three flaws in Microsoft Copilot Personal, together called CoSnitch, where a single click on a crafted link silently exfiltrated data from connected applications. Researchers also used the technique to get Copilot to describe its own security architecture.

Why it matters

The reach of the exfiltration was set by how many applications the assistant was connected to, which is a scope decision most teams make for convenience.

Sources

  1. The Hacker News Microsoft Copilot Personal Flaws Could Let One Click Exfiltrate Data From Connected Apps
  2. Dark Reading 'CoSnitch' Attack Tricked Copilot into Mapping Out Architecture

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Cite or correct this record

“CoSnitch flaws let one click pull data out of Microsoft Copilot's connected apps.” The Permission Layer AI Agent Incident Database, https://thepermissionlayer.com/incidents/copilot-cosnitch/. Database updated October 22, 2026.

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