CVE-2026-75149: Marimo-Team Marimo

High severity, CVSS 8.8. EPSS: 1% chance of exploitation in the next 30 days.

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 with an attacker-controlled command value embedded in a notebook. When the notebook is opened in edit mode, marimo launches the specified command as a local subprocess before any notebook cell is executed, requiring no authentication or cell execution to trigger the vulnerability.

Affected products

• Marimo-Team Marimo: before 0.23.15 (fixed in 0.23.15)

Published 2026-08-19. Last modified 2026-09-16.