We can also customize the app by adding an H2 database driver to our Maven POM file. Spring Boot will then automatically create an embedded database and DataSource instance in the application context.

H2 is a widely-used open-source Java SQL database used for various projects ranging from web platforms like Spring Boot to IoT platforms like ThingWorks.

Critical flaw in the H2 open-source Java SQL database are similar to the Log4J vulnerability, but do not pose a widespread threat.