High severity7.4NVD Advisory· Published Mar 7, 2026· Updated Jul 15, 2026
CVE-2026-24281
CVE-2026-24281
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
org.apache.zookeeper:zookeeperMaven | >= 3.8.0, < 3.8.6 | 3.8.6 |
org.apache.zookeeper:zookeeperMaven | >= 3.9.0, < 3.9.5 | 3.9.5 |
Affected products
47- osv-coords45 versionspkg:apk/chainguard/akhqpkg:apk/chainguard/apache-activemq-artemispkg:apk/chainguard/apache-nifipkg:apk/chainguard/apache-pulsar-4.1pkg:apk/chainguard/apache-pulsar-fips-4.1pkg:apk/chainguard/kafka-3.8pkg:apk/chainguard/kafka-3.9pkg:apk/chainguard/kserve-modelmeshpkg:apk/chainguard/seata-serverpkg:apk/chainguard/solrpkg:apk/chainguard/spark-3.5-scala-2.12pkg:apk/chainguard/spark-3.5-scala-2.13pkg:apk/chainguard/spark-4.0-scala-2.13pkg:apk/chainguard/spark-4.1-scala-2.13pkg:apk/chainguard/spark-fips-3.5-scala-2.12pkg:apk/chainguard/spark-kubernetes-operatorpkg:apk/chainguard/spark-kubernetes-operator-fipspkg:apk/chainguard/strimzi-kafka-operator-kafka-thirdparty-libs-ccpkg:apk/chainguard/trino-plugin-kafkapkg:apk/chainguard/trino-plugin-kafka-event-listenerpkg:apk/chainguard/trino-plugin-pinotpkg:apk/chainguard/trino-plugin-rangerpkg:apk/chainguard/wso2ispkg:apk/chainguard/zookeeper-3.9pkg:apk/chainguard/zookeeper-fips-3.9pkg:apk/wolfi/akhqpkg:apk/wolfi/apache-activemq-artemispkg:apk/wolfi/apache-nifipkg:apk/wolfi/apache-pulsar-4.1pkg:apk/wolfi/kafka-3.8pkg:apk/wolfi/kafka-3.9pkg:apk/wolfi/kserve-modelmeshpkg:apk/wolfi/solrpkg:apk/wolfi/spark-3.5-scala-2.12pkg:apk/wolfi/spark-3.5-scala-2.13pkg:apk/wolfi/spark-4.0-scala-2.13pkg:apk/wolfi/spark-4.1-scala-2.13pkg:apk/wolfi/strimzi-kafka-operator-kafka-thirdparty-libs-ccpkg:apk/wolfi/trino-plugin-kafkapkg:apk/wolfi/trino-plugin-kafka-event-listenerpkg:apk/wolfi/trino-plugin-pinotpkg:apk/wolfi/trino-plugin-rangerpkg:apk/wolfi/zookeeper-3.9pkg:bitnami/zookeeperpkg:maven/org.apache.zookeeper/zookeeper
< 0.26.0-r11+ 44 more
- (no CPE)range: < 0.26.0-r11
- (no CPE)range: < 2.53.0-r2
- (no CPE)range: < 2.8.0-r4
- (no CPE)range: < 4.1.3-r7
- (no CPE)range: < 4.1.3-r7
- (no CPE)range: < 3.8.1-r53
- (no CPE)range: < 3.9.2-r4
- (no CPE)range: < 0.12.0-r26
- (no CPE)range: < 2.6.0-r4
- (no CPE)range: < 10.0.0-r1
- (no CPE)range: < 3.5.8-r6
- (no CPE)range: < 3.5.8-r6
- (no CPE)range: < 4.0.2-r7
- (no CPE)range: < 4.1.1-r7
- (no CPE)range: < 3.5.4-r25
- (no CPE)range: < 0.7.0-r4
- (no CPE)range: < 0.7.0-r2
- (no CPE)range: < 0.51.0-r1
- (no CPE)range: < 480-r0
- (no CPE)range: < 480-r0
- (no CPE)range: < 480-r0
- (no CPE)range: < 480-r0
- (no CPE)range: < 7.3.0-r0
- (no CPE)range: < 3.9.5-r0
- (no CPE)range: < 3.9.5-r0
- (no CPE)range: < 0.26.0-r11
- (no CPE)range: < 2.53.0-r2
- (no CPE)range: < 2.8.0-r4
- (no CPE)range: < 4.1.3-r7
- (no CPE)range: < 3.8.1-r53
- (no CPE)range: < 3.9.2-r4
- (no CPE)range: < 0.12.0-r26
- (no CPE)range: < 10.0.0-r1
- (no CPE)range: < 3.5.8-r6
- (no CPE)range: < 3.5.8-r6
- (no CPE)range: < 4.0.2-r7
- (no CPE)range: < 4.1.1-r7
- (no CPE)range: < 0.51.0-r1
- (no CPE)range: < 480-r0
- (no CPE)range: < 480-r0
- (no CPE)range: < 480-r0
- (no CPE)range: < 480-r0
- (no CPE)range: < 3.9.5-r0
- (no CPE)range: >= 3.8.0, < 3.8.6
- (no CPE)range: >= 3.8.0, < 3.8.6
Patches
Vulnerability mechanics
References
14- www.openwall.com/lists/oss-security/2026/03/07/4nvdMailing ListThird Party AdvisoryWEB
- github.com/advisories/GHSA-7xrh-hqfc-g7qrghsaADVISORY
- lists.apache.org/thread/088ddsbrzhd5lxzbqf5n24yg0mwh9jt2nvdMailing ListVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2026-24281ghsaADVISORY
- github.com/apache/zookeeper/commit/66c4efecdda1302d9cfb3af9eedb122b74452bf3ghsaWEB
- issues.apache.org/jira/browse/ZOOKEEPER-4986ghsaWEB
- access.redhat.com/errata/RHSA-2026:10184nvd
- access.redhat.com/errata/RHSA-2026:14272nvd
- access.redhat.com/errata/RHSA-2026:14276nvd
- access.redhat.com/errata/RHSA-2026:34608nvd
- access.redhat.com/errata/RHSA-2026:8509nvd
- access.redhat.com/security/cve/CVE-2026-24281nvd
- bugzilla.redhat.com/show_bug.cginvd
- security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-24281.jsonnvd
News mentions
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