CVE-2026-24281

Fixed in a distro release EPSS <1%CVSS 5.9

Hostname verification in Apache ZooKeeper ZKTrustManager falls back to reverse DNS (PTR) when IP SAN validation fails, allowing attackers who control or spoof PTR records to impersonate ZooKeeper servers or clients with a valid certificate for the PTR name. It's important to note that attacker must present a certificate which is trusted by ZKTrustManager which makes the attack vector harder to exploit. Users are recommended to upgrade to version 3.8.6 or 3.9.5, which fixes this issue by introducing a new configuration option to disable reverse DNS lookup in client and quorum protocols.

Published 2026-03-07 · CVE record · OSV

Products: Apache Software Foundation Apache ZooKeeper, Red Hat AMQ Broker 7.12.7, Red Hat AMQ Broker 7.13.5, Red Hat AMQ Broker 7.14.0, Red Hat Streams for Apache Kafka 2.9.4, Red Hat OpenShift AI 2.25, Red Hat build of Apache Camel for Spring Boot 4, Red Hat build of Debezium 2, Red Hat build of Debezium 3, Red Hat Data Grid 8, Red Hat Fuse 7, Red Hat JBoss Enterprise Application Platform 7, Red Hat JBoss Enterprise Application Platform 8, Red Hat JBoss Enterprise Application Platform Expansion Pack, Red Hat Offline Knowledge Portal, Red Hat OpenShift AI (RHOAI), Red Hat streams for Apache Kafka 3

Fixed upstream

Distro releases