The CVSS‑9.3 vulnerability allows unauthenticated remote code execution on exposed Marimo servers and was exploited in the wild shortly after disclosure, Sysdig says.

Marimo CVE-2026-39987 exploited within 10 hours of disclosure, enabling unauthenticated RCE and credential theft, emphasizing urgent patching needs.

Over 1,000 exposed ComfyUI instances exploited via unauthenticated code execution, enabling Monero mining and botnet expansion.

Marimo is an integrated development environment for Python that combines code, results, visualizations, and documentation.

A critical pre-authentication remote code execution (RCE) vulnerability in Marimo is now under active exploitation, leveraged ...