AI agent incident

Claude Cowork could break out of its VM and reach any file on the Mac

Reported · 1 source

What happened

Accomplish AI disclosed a sandbox escape in Anthropic's Claude Cowork that let the agent break out of the Linux virtual machine it runs in to read or write files anywhere on the host Mac, affecting roughly 500,000 macOS users.

Why it matters

The VM boundary is the entire security story platform teams tell themselves about desktop coding agents. A confirmed escape means that story needs rechecking rather than repeating.

Sources

  1. The Hacker News Claude Cowork Flaw Could Let AI Agent Escape Its VM and Access Mac Files

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Background reading

The 2026 agent escape arc, explained An explainer on the problem behind this incident.

In the tools directory

This page lists this record as a related incident, next to the products in the category and questions to ask their vendors.

Cite or correct this record

“Claude Cowork could break out of its VM and reach any file on the Mac.” The Permission Layer AI Agent Incident Database, https://thepermissionlayer.com/incidents/claude-cowork-vm-escape/. Database updated October 22, 2026.

Every record traces to the dated sources above. If something here is wrong or missing, email [email protected] and it gets fixed. See this record in the full list.

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