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Vulnerability record · CVE-2026-75149 · published 19 August 2026

CVE-2026-75149: Code injection vulnerability

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.

8.7 CVSS 4.0 High EPSS 0.96% · top 39.9% CWE-94 · Code injection Deferred
8.7CVSS 4.0 base score
0.96%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
4References
16 Sep 2026Last modified by NVD

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
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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Source: NIST National Vulnerability Database (record CVE-2026-75149), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.