Tag: cve 2026 39987
4 articles
Skilled Human Attackers Exploit Marimo Flaw to Reach SSH Bastion in 8 Seconds
In a stunning display of speed, a skilled human attacker exploited a flaw in Marimo to breach a secure SSH bastion in just 8 seconds - a pace typically associated with AI-assisted attacks. This remarkable feat was made possible by a pre-authenticated remote code execution bug, CVE-2026-39987, with a near-perfect CVSS score of 9.3.
Human Exploits Marimo Flaw to Breach SSH Bastion Host in 8 Seconds
In just 8 seconds, a human attacker exploited a vulnerability in Marimo notebooks to breach an SSH bastion host, showcasing the alarming speed and ease of lateral movement within compromised systems. This lightning-fast breach was achieved without the aid of AI tools, highlighting the severity of the CVE-2026-39987 flaw.
LLM Agent Enables Rapid Post-Exploitation in Marimo Networks
On May 10, 2026, a savvy attacker used a large language model agent to rapidly exploit a vulnerable Marimo instance, leveraging CVE-2026-39987 to spark a swift and damaging breach. This critical vulnerability allowed the attacker to execute arbitrary system commands, paving the way for cloud credential theft and further malicious activity.
Marimo Flaw CVE-2026-39987 Exploited Rapidly After Disclosure
A single line of code can drastically change the risk landscape for thousands of users - and that's exactly what happened with Marimo, an open-source Python notebook, when a critical vulnerability (CVE-2026-39987) was exploited just 10 hours after its disclosure. This severe flaw, with a CVSS score of 9.3, allows pre-authenticated remote code execution, putting all Marimo versions prior to the disclosed fix at risk.