Attackers Use LLM Agent for Post-Exploitation After Marimo CVE-2026-39987 Exploit

An attacker exploited CVE-2026-39987, a critical vulnerability in Marimo (a notebook software) that allows unauthenticated remote code execution, to break into a system and then used an LLM agent (an AI system that can plan and execute tasks autonomously) to steal cloud credentials and database information. The attacker's use of an AI agent made the attack more flexible and adaptive compared to traditional scripted attacks, allowing it to handle unexpected obstacles in real-time.