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CVE-2026-67618— marimo < 0.23.15 API Key Exfiltration via Malicious Notebook PEP-723 Metadata

Quick assessment

Affected
marimo-team marimo
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

marimo是marimo团队开源的一款可复现的交互式Python笔记本框架。 marimo 0.23.15之前版本存在输入验证错误漏洞，该漏洞源于PEP-723内联脚本元数据中嵌入恶意base_url，且sanitize_pyproject_dict清理不足，可能导致笔记本作者窃取操作员API密钥，并通过AI请求将密钥传输至攻击者控制的端点，无需执行任何单元格。

CVSS 6.5 · Medium EPSS 0.29% · P20

Affected Version Matrix 1

VendorProduct Version RangeStatus
marimo-team marimo < 0.23.15 affected
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I. Basic Information for CVE-2026-67618

Vulnerability Information
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Vulnerability Title
marimo < 0.23.15 API Key Exfiltration via Malicious Notebook PEP-723 Metadata
Source: CVE Program / CVE List V5
Vulnerability Description
marimo before 0.23.15 contains a configuration injection vulnerability that allows notebook authors to exfiltrate operator API keys by embedding a malicious base_url in PEP-723 inline script metadata, which is merged into session configuration with higher precedence than the operator's own settings due to insufficient sanitization in sanitize_pyproject_dict. When an operator opens the crafted notebook and makes an AI request, marimo resolves the attacker-controlled base_url from the notebook config while falling back to the operator's OPENAI_API_KEY environment variable for authentication, transmitting the API key to the attacker-controlled endpoint without requiring any cell execution.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对数据真实性的验证不充分
Source: CVE Program / CVE List V5
Vulnerability Title
marimo 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
marimo是marimo团队开源的一款可复现的交互式Python笔记本框架。 marimo 0.23.15之前版本存在输入验证错误漏洞，该漏洞源于PEP-723内联脚本元数据中嵌入恶意base_url，且sanitize_pyproject_dict清理不足，可能导致笔记本作者窃取操作员API密钥，并通过AI请求将密钥传输至攻击者控制的端点，无需执行任何单元格。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
marimo-team marimo 0 ~ 0.23.15 -

II. Public POCs for CVE-2026-67618

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III. Intelligence Information for CVE-2026-67618

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Patches & Fixes for CVE-2026-67618 (2)

Vendor Advisories for CVE-2026-67618 (1)

Vendor Pages for CVE-2026-67618 (1)

IV. Related Vulnerabilities

Same product: marimo
Same vendor: marimo-team
Same weakness: CWE-345

V. Comments for CVE-2026-67618

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