{"id":"CVE-2026-67618","state":"PUBLISHED","title":"marimo < 0.23.15 API Key Exfiltration via Malicious Notebook PEP-723 Metadata","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.","publishedAt":"2026-08-04T14:30:48.244Z","updatedAt":"2026-08-04T15:05:08.409Z","severity":{"score":7.1,"label":"High","version":"4.0","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","source":"VulnCheck"},"assigner":"VulnCheck","products":["marimo-team marimo"],"affected":[{"vendor":"marimo-team","product":"marimo","packageURL":"pkg:github/marimo-team/marimo","defaultStatus":"affected","versions":[{"version":"0","status":"affected","lessThan":"0.23.15","versionType":"semver"}],"repo":"https://github.com/marimo-team/marimo"}],"references":["https://github.com/marimo-team/marimo/releases/tag/0.23.15","https://github.com/marimo-team/marimo/pull/10281","https://github.com/marimo-team/marimo/commit/1a21bd71e258438d2511136b5edacc94c08855f4","https://www.vulncheck.com/advisories/marimo-api-key-exfiltration-via-malicious-notebook-pep-723-metadata"],"weaknesses":["CWE-345"],"ingestedAt":"2026-10-29T20:12:41.951Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/67xxx/CVE-2026-67618.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-67618","state":"PUBLISHED","datePublished":"2026-08-04T14:30:48.244Z","dateUpdated":"2026-08-04T15:05:08.409Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-07-29T21:07:39.203Z"},"containers":{"cna":{"title":"marimo < 0.23.15 API Key Exfiltration via Malicious Notebook PEP-723 Metadata","descriptions":[{"lang":"en","value":"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. 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