Grafana is Grafana Labs open source set of open source monitoring tools that provide a visual monitoring interface. A denial-of-service vulnerability exists in Grafana versions prior to 8.5.14, 9.0.0 and later, and prior to 9.1.8, which stems from a program that allows a user to block another user by registering another person’s email address as a username. An attacker could use the vulnerability to launch a denial-of-service attack.