CVE-2026-39987

Marimo Remote Code Execution Vulnerability

Marimo

marimo is a reactive Python notebook. Prior to 0.23.0, Marimo has a Pre-Auth RCE vulnerability. The terminal WebSocket endpoint /terminal/ws lacks authentication validation, allowing an unauthenticated attacker to obtain a full PTY shell and execute arbitrary system commands. Unlike other WebSocket endpoints (e.g., /ws) that correctly call validate_auth() for authentication, the /terminal/ws endpoint only checks the running mode and platform support before accepting…

9. Apr 2026

Ausgewertete Quellen

• Hinweis
  https://www.sysdig.com/blog/marimo-oss-python-notebook-rce-from-disclosure-to-exploitation-in-under-10-hours
• CISA
  https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-39987
• CISA
  Marimo Remote Code Execution Vulnerability
• NVD
  CVE-2026-39987
• GitHub
  https://github.com/marimo-team/marimo/security/advisories/GHSA-2679-6mx9-h9xc