Critical Marimo Security Vulnerability Enables Remote Code Execution Attacks

A critical security vulnerability in the Marimo Python notebook framework is being actively exploited to achieve pre-authentication remote code execution (RCE), allowing attackers to gain full control of exposed systems. Tracked as CVE-2026-39987, the flaw stems from a missing authentication check in a WebSocket terminal endpoint, enabling attackers to spawn system-level shells without logging in. Security […]

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