CVE-2026-39987: Marimo Python Notebook RCE Exploited in Under 10 Hours — Full Technical Breakdown
A critical pre-authentication RCE vulnerability in Marimo, the open-source Python notebook platform, was weaponized by threat actors in under 10 hours of disclosure — with no public PoC available. Here is the full technical breakdown of the attack chain, attacker TTPs, and what defenders must do right now.
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