A critical vulnerability in Marimo was exploited by a hacker just nine hours after its public disclosure, demonstrating the rapid pace of malicious activity in the cyber threat landscape. The unauthenticated bug, which was made public, allowed the attacker to quickly develop a working exploit and begin using it in real-world attacks. This swift exploitation highlights the importance of prompt patching and vigilance among security teams, as the window for remediation is extremely narrow. The fact that a hacker was able to build an exploit so quickly underscores the need for organizations to stay informed about emerging threats and have a plan in place to respond to them1. This incident serves as a stark reminder that security teams must be prepared to act rapidly in the face of newly disclosed vulnerabilities, as the time between disclosure and exploitation can be measured in hours, not days.