importantSYS.SOURCE: The Hacker News• 2026-08-25T18:13:51+05:30

Critical Security Flaw in Marimo Notebook Allows Pre-Execution MCP Command Injection

#vulnerability #code-injection #ai-security #open-source-security #security-flaw

A critical security flaw (CVE-2026-75149) in Marimo Notebook allows execution of attacker-supplied Model Context Protocol (MCP) commands before notebook cells run in edit mode, with a patch released in version 0.23.15. The vulnerability requires user interaction and affects versions prior to 0.23.15, posing risks for unauthorized command execution.

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 run as a local subprocess when the notebook is opened in edit mode.

The vulnerability, tracked

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> ANTHROPIC ENHANCES CLAUDE COWORK WITH UNIFIED MEMORY SYSTEM FOR CONTINUOUS CONTEXT RETENTION > WAYMO EXPANDS AUTONOMOUS RIDE-HAILING TO MUNICH > CLARA (YC P26) SEEKS FULL-STACK GROWTH ENGINEER FOR AI-DRIVEN PRIMARY CARE EXPANSION > RUNNING OPENBSD ON DIGITALOCEAN AT $4.24/MONTH: A STEP-BY-STEP GUIDE > LIGHTWEIGHT GO-BASED SYSTEM MONITOR FOR LINUX VPS > PUBLIC NITTER INSTANCES TEMPORARILY UNAVAILABLE DUE TO RATE LIMITING > REVISITING THE NATURE OF BLACK HOLE SINGULARITIES: A SURFACE RATHER THAN A POINT > NEW UPPER BOUND FOR THE DE BRUIJN–NEWMAN CONSTANT DEMONSTRATES PROGRESS TOWARD PROVING THE RIEMANN HYPOTHESIS > WATER CONSUMPTION RISKS IN DATA CENTER OPERATIONS > THE LIFE AND VENTURES OF AARON: A FRIEND'S PERSPECTIVE> ANTHROPIC ENHANCES CLAUDE COWORK WITH UNIFIED MEMORY SYSTEM FOR CONTINUOUS CONTEXT RETENTION > WAYMO EXPANDS AUTONOMOUS RIDE-HAILING TO MUNICH > CLARA (YC P26) SEEKS FULL-STACK GROWTH ENGINEER FOR AI-DRIVEN PRIMARY CARE EXPANSION > RUNNING OPENBSD ON DIGITALOCEAN AT $4.24/MONTH: A STEP-BY-STEP GUIDE > LIGHTWEIGHT GO-BASED SYSTEM MONITOR FOR LINUX VPS > PUBLIC NITTER INSTANCES TEMPORARILY UNAVAILABLE DUE TO RATE LIMITING > REVISITING THE NATURE OF BLACK HOLE SINGULARITIES: A SURFACE RATHER THAN A POINT > NEW UPPER BOUND FOR THE DE BRUIJN–NEWMAN CONSTANT DEMONSTRATES PROGRESS TOWARD PROVING THE RIEMANN HYPOTHESIS > WATER CONSUMPTION RISKS IN DATA CENTER OPERATIONS > THE LIFE AND VENTURES OF AARON: A FRIEND'S PERSPECTIVE