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Wednesday, 28 October 2026
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Incident database

marimo Code Injection via MCP Server Configuration

marimo before 0.23.15 contains a code injection vulnerability in the notebook configuration handler that allows attackers to execute arbitrary commands by supplying a crafted MCP server entry. The vulnerability is triggered when a notebook is opened in edit mode without requiring authentication or cell execution.

Disclosed 19 August 2026 · Record updated 1 October 2026

Impact

Arbitrary command execution on local system when opening a crafted notebook in edit mode

Our coverage

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Sources

  1. nvd.nist.govhttps://nvd.nist.gov/vuln/detail/CVE-2026-75149