{"id":"CVE-2026-67618","title":"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 configu…","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 configu…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N","cwe":["CWE-345"],"published":"2026-08-04","updated":"2026-09-16","sourceUpdated":"2026-09-16T13:42:43.283","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-67618","references":[{"url":"https://github.com/marimo-team/marimo/commit/1a21bd71e258438d2511136b5edacc94c08855f4","label":"disclosure@vulncheck.com"},{"url":"https://github.com/marimo-team/marimo/pull/10281","label":"disclosure@vulncheck.com"},{"url":"https://github.com/marimo-team/marimo/releases/tag/0.23.15","label":"disclosure@vulncheck.com"},{"url":"https://www.vulncheck.com/advisories/marimo-api-key-exfiltration-via-malicious-notebook-pep-723-metadata","label":"disclosure@vulncheck.com"}],"tags":["nvd"],"epss":0.00198,"epssPercentile":0.09917,"ingestedAt":"2026-09-16T13:56:12.584Z","slug":"CVE-2026-67618","body":"## Overview\n\nmarimo 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":36,"depthScoreParts":{"impact":35.8,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}