Fauna’s data API quickly stores application data without managing or scaling a database, leveraging services that run on the Java Virtual Machine (JVM) and Apache Log4j, which was recently found vulnerable to a critical zero-day exploit nicknamed Log4Shell. Upon becoming aware of the vulnerability, Fauna engineers rapidly investigated their internal systems, patched impacted services, and deployed fixes to production, ensuring customer data remained secure without requiring additional action from customers. With operational logs showing a large number of attackers scanning for susceptible services, Fauna encourages developers to follow mitigation options provided by the Apache Software Foundation (ASF) to protect against future attacks.