The Cosmos 🌌 team at Bishop Fox 🦊 is currently researching open-source projects that appear to use Log4j by default. This list is likely incomplete; we'll continue to share affected technologies here as we identify them.
- Apache Druid
- Apache Dubbo
- Apache Flink
- Apache Flume
- Apache Hadoop
- Apache Kafka
- Apache Solr
- Apache Spark
- Apache Struts
- Apache Tapestry
- Apache Wicket
- Elastic Elasticsearch
- Elastic Logstash
- Ghidra
- Grails
- Graylog
- Minecraft
The following projects don't appear to use Log4j by default, though they may optionally be configured to use it.
- Apache Tomcat
- Dropwizard
- Elastic Kibana
- Hibernate
- JavaServer Faces
- Oracle ATG Web Commerce
- Spring Framework
Thanks to @sshell for the deep dive on this list.