CVE-2026-75149: Improper Control of Generation of Code ('Code Injection') in marimo-team marimo
marimo before version 0.23.15 has a code injection vulnerability in its notebook configuration handler. This flaw allows attackers to execute arbitrary commands locally by embedding a crafted MCP server entry with malicious commands inside a notebook. The vulnerability is triggered simply by opening the notebook in edit mode, without requiring authentication or execution of any notebook cells.
AI Analysis
Technical Summary
CVE-2026-75149 describes a code injection vulnerability in marimo versions prior to 0.23.15. The issue exists in the notebook configuration handler where an attacker can supply a specially crafted MCP server entry containing attacker-controlled commands. When a user opens the affected notebook in edit mode, marimo executes the embedded command as a local subprocess before any notebook cell runs. This occurs without any authentication or user action beyond opening the notebook, enabling remote code execution with high impact.
Potential Impact
An attacker can achieve remote code execution on the local system by embedding malicious commands in a notebook. This can lead to full compromise of the affected system with no authentication required and no user interaction beyond opening the notebook in edit mode. The CVSS 4.0 score of 8.7 reflects the high severity and ease of exploitation.
Mitigation Recommendations
Users should upgrade marimo to version 0.23.15 or later, where this vulnerability is fixed. Until then, avoid opening untrusted notebooks in edit mode. Patch status is confirmed fixed in 0.23.15.
CVE-2026-75149: Improper Control of Generation of Code ('Code Injection') in marimo-team marimo
Description
marimo before version 0.23.15 has a code injection vulnerability in its notebook configuration handler. This flaw allows attackers to execute arbitrary commands locally by embedding a crafted MCP server entry with malicious commands inside a notebook. The vulnerability is triggered simply by opening the notebook in edit mode, without requiring authentication or execution of any notebook cells.
CVSS v4.0
Score 8.7high
Affected software
marimo-team
marimo
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-75149 describes a code injection vulnerability in marimo versions prior to 0.23.15. The issue exists in the notebook configuration handler where an attacker can supply a specially crafted MCP server entry containing attacker-controlled commands. When a user opens the affected notebook in edit mode, marimo executes the embedded command as a local subprocess before any notebook cell runs. This occurs without any authentication or user action beyond opening the notebook, enabling remote code execution with high impact.
Potential Impact
An attacker can achieve remote code execution on the local system by embedding malicious commands in a notebook. This can lead to full compromise of the affected system with no authentication required and no user interaction beyond opening the notebook in edit mode. The CVSS 4.0 score of 8.7 reflects the high severity and ease of exploitation.
Mitigation Recommendations
Users should upgrade marimo to version 0.23.15 or later, where this vulnerability is fixed. Until then, avoid opening untrusted notebooks in edit mode. Patch status is confirmed fixed in 0.23.15.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-08-17T18:39:57.662Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a85f0f8acd9273b496dcaf2
Added to database: 08/19/2026, 18:07:52 UTC
Last enriched: 09/11/2026, 07:16:59 UTC
Last updated: 10/02/2026, 14:46:10 UTC
Views: 72
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