Missing Authentication for Critical Function Affecting marimo package, versions [,0.23.0)
Threat Intelligence
Snyk has reported that there have been attempts or successful attacks targeting this vulnerability.
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.
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Start learning- Snyk IDSNYK-PYTHON-MARIMO-15954201
- published9 Apr 2026
- disclosed8 Apr 2026
- creditq1uf3ng
Introduced: 8 Apr 2026
CVE-2026-39987 (opens in a new tab)How to fix?
Upgrade marimo to version 0.23.0 or higher.
Overview
marimo is an A library for making reactive notebooks and apps
Affected versions of this package are vulnerable to Missing Authentication for Critical Function via the terminal/ws WebSocket endpoint, which lacks authentication validation. An unauthenticated attacker can gain unauthorized access to a full interactive shell and execute arbitrary system commands by connecting to the WebSocket endpoint.