Red Hat Lightwell has released org.apache.kafka:kafka-clients 3.9.1.rhlw-00001 with backported fixes for CVE-2026-33558 and CVE-2026-35554.
CVE-2026-33558: Apache Kafka, Apache Kafka Clients: Information Exposure Through Network Client Log Output
CVE-2026-35554: Apache Kafka Clients: Kafka Producer Message Corruption and Misrouting via Buffer Pool Race Condition
This patched artifact is a drop-in replacement for org.apache.kafka:kafka-clients 3.9.1 from Maven Central.