In all currently supported versions of Commvault, server components use the Commvault JRE, which is a repackage of the AdoptOpenJDK or Temurin JREs. Those JREs are completely free and have no license fees. The Commvault JRE is routinely updated to newer java versions along with other Commvault updates.
If the CommCell Console is installed using the Commvault installer, it can be run locally using the Commvault JRE and no other Java software is required.
However, the CommCell Console can also be loaded via a web browser and run on any machine. In that scenario, a JRE must be present on the machine, and that java installation will not be installed or managed by Commvault.
To avoid licensing issues in that case, customers can use Temurin's free Java 8 JRE, instead of Oracle's Java 8 JRE, in combination with the Standalone CommCell Console (NetX.jar). More information on NetX.jar is available in Commvault documentation.