The Coralogix team swiftly addressed the critical Log4j vulnerability, known as "Log4Shell," by updating their systems and ensuring the security of their customers. This vulnerability, discovered in December 2021, allowed remote code execution through a specific string in the log4j2 logging library. To mitigate potential risks, Coralogix employed a strategic approach that included updating JVM-based services, utilizing containerization best practices, and leveraging a version-controlled codebase to identify vulnerable areas quickly. By mobilizing their engineering team, they rapidly implemented necessary patches across hundreds of microservices, demonstrating the advantages of a cohesive team structure over larger organizations that struggled publicly. Their proactive response highlighted the importance of owning their software stack and maintaining a responsive and tight-knit team to handle security challenges effectively.