Is CVE-2026-75149 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-75149?

CVE-2026-75149 has a CVSS v3 severity of HIGH (8.8).

Back

CVE-2026-75149

Description

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.