CVE-2026-44249

About vulnerability

Netty is a network application framework for development of protocol servers and clients. In netty-handler prior to versions 4.1.135.Final and 4.2.15.Final, an attacker can bypass IPv6 subnet rules due to an incorrect masking operation in IpSubnetFilterRule.compareTo(). Valid public IP addresses can bypass the restrictions. Versions 4.1.135.Final and 4.2.15.Final patch the issue.

Affected product:

Apache CXF , Apache Hadoop , Apache Kafka , Apache Log4j , Apache Solr , Apache Spark , Eclipse Jetty , Netty , React , Spring , Wildfly , artemis , async-http-client , avro , aws-sdk-java , azure-sdk-for-java , bolt-connection-java , californium , camel , cassandra-java-driver , catalyst , couchbase-jvm-clients , curator , docker-java , drill , elasticsearch , flink , flink-shaded , grpc-java , infinispan , java-driver , lettuce , logging-flume , milo , neo4j-java-driver , neo4j-ogm , netty , olingo-odata4 , pgjdbc-ng , pulsar , rabbitmq-stream-java-client , rsocket-java , stack-core , tika , vert.x , wildfly , zendesk-java-client , zookeeper

Affected packages:

avro-ipc-netty @ 1.11.0 (+7865 more)

Netty is a network application framework for development of protocol servers and clients. In netty-handler prior to versions 4.1.135.Final and 4.2.15.Final, an attacker can bypass IPv6 subnet rules due to an incorrect masking operation in IpSubnetFilterRule.compareTo(). Valid public IP addresses can bypass the restrictions. Versions 4.1.135.Final and 4.2.15.Final patch the issue.