Insufficient Verification of Data Authenticity Affecting marimo package, versions [,0.23.15)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-PYTHON-MARIMO-18600491
- published9 Aug 2026
- disclosed4 Aug 2026
- creditsajdakabir
Introduced: 4 Aug 2026
NewCVE-2026-67618 (opens in a new tab)How to fix?
Upgrade marimo to version 0.23.15 or higher.
Overview
marimo is an A library for making reactive notebooks and apps
Affected versions of this package are vulnerable to Insufficient Verification of Data Authenticity via sanitize_pyproject_dict in the PEP-723 script metadata handling path. An attacker can exfiltrate an operator’s API key by embedding a malicious tool.marimo.ai.open_ai.base_url in a notebook, then waiting for the operator to open the notebook and make an AI request. Notebook inline metadata is merged into session configuration with higher precedence than the operator’s own settings, so the attacker-controlled base_url is used for the outbound request while marimo falls back to the operator’s OPENAI_API_KEY for authentication. This sends the operator’s key to the attacker’s endpoint without requiring any cell execution.