CVE-2026-67618

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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
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-api-key-exfiltration-via-malicious-notebook-pep-723-metadata

Configurations

No configuration.

History

No history.

Information

Published : 2026-08-04 15:16

Updated : 2026-09-16 13:42

NVD link : CVE-2026-67618

Mitre link : CVE-2026-67618

CVE.ORG link : CVE-2026-67618

JSON object : View

Products Affected

No product.

CWE

CWE-345

Insufficient Verification of Data Authenticity

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