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CVE-2026-67618

📛 CVE Title

marimo < 0.23.15 API Key Exfiltration via Malicious Notebook PEP-723 Metadata

⬇ Download JSON ⚠ View as Threat

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.

Overview

State
PUBLISHED
Assigner (CNA)
VulnCheck
CVSS severity
HIGH
CVSS score
CVSS 7.1 / 10 7.1 7.1 / 10
CVSS vector
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
Effective score
7.1 / 10 HIGH source: CNA overview
CWE(s)
CWE-345
Reserved
2026-07-29
Published
2026-08-04 14:30 UTC
Last updated
2026-08-04 15:05 UTC
Source
https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/67xxx/CVE-2026-67618.json
Linked Threat
CVE-2026-67618 — marimo < 0.23.15 API Key Exfiltration via Malicious Notebook PEP-723 Metadata

Affected products (1)
VendorProductVersionsPlatforms
marimo-team marimo 0 (affected) —

Vendor references (4)

References embedded in the original CVE record by the assigning CNA.

Web references (0)

DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.

No web references attached yet.

AI Forensic Analysis

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Raw JSON

The full cvelistV5 record. Download as CVE-2026-67618.json.

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          "url": "https://github.com/marimo-team/marimo/releases/tag/0.23.15"
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    "dateReserved": "2026-07-29T21:07:39.203Z",
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