Critical Marimo RCE Flaw Could Let Attackers Execute Malicious Code Remotely

A newly disclosed critical vulnerability in the Marimo Python notebook framework is raising serious alarms across the cybersecurity community, as it allows attackers to execute arbitrary commands remotely, without authentication. Tracked as CVE-2026-39987, the flaw exposes a WebSocket endpoint that can be abused to spawn a system-level shell, potentially leading to full infrastructure compromise. Marimo RCE […]

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