CVE-2026-67618 (GCVE-0-2026-67618)

Vulnerability from cvelistv5 – Published: 2026-08-04 14:30 – Updated: 2026-11-08 14:08 X_Open Source
VLAI
Title
marimo < 0.23.15 API Key Exfiltration via Malicious Notebook PEP-723 Metadata
Summary
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.
Severity
7.1 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
6.5 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-04 15:04 UTC
CWE
  • CWE-345 - Insufficient Verification of Data Authenticity
Assigner
VulnCheck CNA under the mitre root
CNA scorecard B 84/100 over 8186 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
marimo-team marimo Affected: 0 , < 0.23.15 (semver)
guessed Create a notification for this product.
Date Public
2026-08-04 00:00
Credits
Gregory Tan (Grg0rry)
Show details on NVD website
To clipboard 

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