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Marimo Notebook Flaw Could Run MCP Commands Before Cells Execute in Edit Mode

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Marimo Notebook Flaw Could Run MCP Commands Before Cells Execute in Edit Mode

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Correction recorded as of .

vulnerabilities

Marimo Notebook Flaw Could Run MCP Commands Before Cells Execute in Edit Mode

Marimo notebook software contained a high-severity flaw allowing arbitrary Model Context Protocol (MCP) commands to execute as local subprocesses when a malicious notebook was opened in edit mode. The vendor has released a fix addressing the issue.

Why it matters: Users who open untrusted Marimo notebooks in edit mode face code execution risk; practitioners should update to the patched version and review access controls for notebook sources.

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