CVE-2026-50011

About vulnerability

Netty is a network application framework for development of protocol servers and clients. Prior to versions 4.1.135.Final and 4.2.15.Final, RedisArrayAggregator pre-allocates ArrayList with initial capacity equal to the RESP array element count declared in an array header. That count is taken from the wire before the corresponding child messages exist. A small malicious header can claim a huge initial capacity. Versions 4.1.135.Final and 4.2.15.Final patch the issue.

Affected product:

Apache CXF , Apache Kafka , Apache Log4j , Apache Spark , Eclipse Jetty , Netty , React , Spring , Wildfly , artemis , async-http-client , azure-sdk-for-java , camel , cassandra-java-driver , couchbase-jvm-clients , elasticsearch , grpc-java , infinispan , java-driver , lettuce , logging-flume , neo4j-java-driver , netty , rsocket-java , tika , wildfly , zookeeper

Affected packages:

netty-codec-redis @ 4.1.64.Final (+5735 more)

Netty is a network application framework for development of protocol servers and clients. Prior to versions 4.1.135.Final and 4.2.15.Final, RedisArrayAggregator pre-allocates ArrayList with initial capacity equal to the RESP array element count declared in an array header. That count is taken from the wire before the corresponding child messages exist. A small malicious header can claim a huge initial capacity. Versions 4.1.135.Final and 4.2.15.Final patch the issue.