What’s Vulnerable › Vulnerabilities

CVE-2026-75149: marimo < 0.23.15 Code Injection via MCP Server Configuration

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-19 · updated 2026-09-16
• Weakness: CWE-94

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.

Affected products

• marimo-team marimo: before 0.23.15 — fixed in 0.23.15

How to fix

Upgrade to a fixed version: marimo-team marimo 0.23.15. Check the vendor advisory for mitigations.

References

• https://github.com/marimo-team/marimo/commit/1a21bd71e258438d2511136b5edacc94c08855f4
• https://github.com/marimo-team/marimo/pull/10281
• https://github.com/marimo-team/marimo/releases/tag/0.23.15
• https://www.vulncheck.com/advisories/marimo-code-injection-via-mcp-server-configuration

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