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

Marimo has addressed a high-severity security flaw in its notebook software that allowed an attacker to execute an attacker-supplied Model Context Protocol MCP command in a specially crafted notebook, according to VulnCheck's CVE Numbering Authority CNA record. The CNA record says the command can...

CVE-2026-75149 marimo < 0.23.15 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 with an attacker-controlled command value embedded in a notebook. When the notebook is opened in edit mod...

CVE-2026-75149

The marimo Python notebook framework (versions before 0.23.15) launches attacker-controlled commands embedded in a notebook's MCP server configuration as local subprocesses upon opening in edit mode, requiring no authentication or cell execution. CVSS 3.1 scores this HIGH (8.8). Upgrade to 0.23.1...

CVE-2026-75149 marimo < 0.23.15 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 with an attacker-controlled command value embedded in a notebook. When the notebook is opened in edit mod...

PT-2026-78557

Name of the Vulnerable Software and Affected Versions marimo versions prior to 0.23.15 Description A code injection flaw exists in the notebook configuration handler. Attackers can execute arbitrary commands by embedding a crafted MCP server entry with a controlled command value within a notebook...