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7.4
HIGH CVSS 3.1
CVE-2026-24281
Apache ZooKeeper: Reverse-DNS fallback enables hostname verification bypass in ZooKeeper ZKTrustManager
Overview
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.

Details
INFO

Published Date :

March 7, 2026, 9:16 a.m.

Last Modified :

July 15, 2026, 2:18 a.m.

Remotely Exploit :

Yes !

Source :

[email protected]
Impact
Affected Products

The following products are affected by CVE-2026-24281 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Apache zookeeper
: Total Affected Vendor : 1 | Products : 1
Scoring
CVSS Scores
The Common Vulnerability Scoring System is a standardized framework for assessing the severity of vulnerabilities in software and systems. We collect and displays CVSS scores from various sources for each CVE.
Score Version Severity Vector Exploitability Score Impact Score Source
CVSS 134c704f-9b21-4f2e-91b3-4a467353bcc0
CVSS 3.1 HIGH [email protected]
CVSS 3.1 MEDIUM 134c704f-9b21-4f2e-91b3-4a467353bcc0
CVSS 3.1 HIGH 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
Solution
Update Apache ZooKeeper to a patched version or disable reverse DNS lookup.
  • Upgrade Apache ZooKeeper to version 3.8.6 or 3.9.5.
  • Disable reverse DNS lookup in client and quorum protocols.
  • Ensure PTR records are validated where applicable.
References
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2026-24281.

URL Resource
https://lists.apache.org/thread/088ddsbrzhd5lxzbqf5n24yg0mwh9jt2 Mailing List Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/03/07/4 Mailing List Third Party Advisory
https://access.redhat.com/errata/RHSA-2026:10184
https://access.redhat.com/errata/RHSA-2026:14272
https://access.redhat.com/errata/RHSA-2026:14276
https://access.redhat.com/errata/RHSA-2026:34608
https://access.redhat.com/errata/RHSA-2026:8509
https://access.redhat.com/security/cve/CVE-2026-24281
https://bugzilla.redhat.com/show_bug.cgi?id=2445449
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-24281.json
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2026-24281 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2026-24281 weaknesses.

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2026-24281 vulnerability anywhere in the article.

  • CybersecurityNews
Apache ZooKeeper Vulnerability Allow Attackers to Access Sensitive Data

Apache ZooKeeper Vulnerability Two “Important” severity vulnerabilities have been disclosed in Apache ZooKeeper, a widely used service for configuration management and naming in distributed applicatio ... Read more

Published Date: Mar 10, 2026 (4 months, 1 week ago)
  • Daily CyberSecurity
Critical Bypasses and Secret Leaks Patched in Apache ZooKeeper

The Apache Software Foundation has released an urgent security update for Apache ZooKeeper, the mission-critical service used by thousands of distributed applications for configuration, naming, and sy ... Read more

Published Date: Mar 09, 2026 (4 months, 1 week ago)

Results are limited to the first 20 news articles due to potential performance issues.

The following table lists the changes that have been made to the CVE-2026-24281 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

    Jul. 15, 2026

    Action Type Old Value New Value
    Changed Affected [{'cpes': ['cpe:/a:redhat:amq_broker:7.12'], 'vendor': 'Red Hat', 'product': 'Red Hat AMQ Broker 7.12.7', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:amq_broker:7.13'], 'vendor': 'Red Hat', 'product': 'Red Hat AMQ Broker 7.13.5', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:amq_broker:7.14'], 'vendor': 'Red Hat', 'product': 'Red Hat AMQ Broker 7.14.0', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:openshift_ai:2.25::el9'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift AI 2.25', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:amq_streams:2.9::el9'], 'vendor': 'Red Hat', 'product': 'Streams for Apache Kafka 2.9.4', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:debezium:2'], 'vendor': 'Red Hat', 'product': 'Red Hat build of Debezium 2', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:debezium:3'], 'vendor': 'Red Hat', 'product': 'Red Hat build of Debezium 3', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:jboss_fuse:7'], 'vendor': 'Red Hat', 'product': 'Red Hat Fuse 7', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:jbosseapxp'], 'vendor': 'Red Hat', 'product': 'Red Hat JBoss Enterprise Application Platform Expansion Pack', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:offline_knowledge_portal:1'], 'vendor': 'Red Hat', 'product': 'Red Hat Offline Knowledge Portal', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:openshift_ai'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift AI (RHOAI)', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:amq_streams:3'], 'vendor': 'Red Hat', 'product': 'streams for Apache Kafka 3', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:camel_spring_boot:4'], 'vendor': 'Red Hat', 'product': 'Red Hat build of Apache Camel for Spring Boot 4', 'defaultStatus': 'unaffected'}, {'cpes': ['cpe:/a:redhat:jboss_data_grid:8'], 'vendor': 'Red Hat', 'product': 'Red Hat Data Grid 8', 'defaultStatus': 'unaffected'}, {'cpes': ['cpe:/a:redhat:jboss_enterprise_application_platform:7'], 'vendor': 'Red Hat', 'product': 'Red Hat JBoss Enterprise Application Platform 7', 'defaultStatus': 'unaffected'}, {'cpes': ['cpe:/a:redhat:jboss_enterprise_application_platform:8'], 'vendor': 'Red Hat', 'product': 'Red Hat JBoss Enterprise Application Platform 8', 'defaultStatus': 'unaffected'}] [{'cpes': ['cpe:/a:redhat:amq_broker:7.12'], 'vendor': 'Red Hat', 'product': 'Red Hat AMQ Broker 7.12.7', 'packageName': 'zookeeper', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'unaffected'}, {'cpes': ['cpe:/a:redhat:amq_broker:7.13'], 'vendor': 'Red Hat', 'product': 'Red Hat AMQ Broker 7.13.5', 'packageName': 'zookeeper', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'unaffected'}, {'cpes': ['cpe:/a:redhat:amq_broker:7.14'], 'vendor': 'Red Hat', 'product': 'Red Hat AMQ Broker 7.14.0', 'packageName': 'zookeeper', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'unaffected'}, {'cpes': ['cpe:/a:redhat:amq_streams:2.9::el9'], 'vendor': 'Red Hat', 'product': 'Streams for Apache Kafka 2.9.4', 'packageName': 'zookeeper', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'unaffected'}, {'cpes': ['cpe:/a:redhat:openshift_ai:2.25::el9'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift AI 2.25', 'versions': [{'status': 'unaffected', 'version': '1776756834', 'lessThan': '*', 'versionType': 'rpm'}], 'packageName': 'rhoai/odh-modelmesh-rhel9', 'collectionURL': 'https://catalog.redhat.com/software/containers/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:camel_spring_boot:4'], 'vendor': 'Red Hat', 'product': 'Red Hat build of Apache Camel for Spring Boot 4', 'packageName': 'zookeeper', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'unaffected'}, {'cpes': ['cpe:/a:redhat:debezium:2'], 'vendor': 'Red Hat', 'product': 'Red Hat build of Debezium 2', 'packageName': 'zookeeper', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:debezium:3'], 'vendor': 'Red Hat', 'product': 'Red Hat build of Debezium 3', 'packageName': 'zookeeper', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:jboss_data_grid:8'], 'vendor': 'Red Hat', 'product': 'Red Hat Data Grid 8', 'packageName': 'zookeeper', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'unaffected'}, {'cpes': ['cpe:/a:redhat:jboss_fuse:7'], 'vendor': 'Red Hat', 'product': 'Red Hat Fuse 7', 'packageName': 'zookeeper', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:jboss_enterprise_application_platform:7'], 'vendor': 'Red Hat', 'product': 'Red Hat JBoss Enterprise Application Platform 7', 'packageName': 'zookeeper', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'unaffected'}, {'cpes': ['cpe:/a:redhat:jboss_enterprise_application_platform:8'], 'vendor': 'Red Hat', 'product': 'Red Hat JBoss Enterprise Application Platform 8', 'packageName': 'zookeeper', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'unaffected'}, {'cpes': ['cpe:/a:redhat:jbosseapxp'], 'vendor': 'Red Hat', 'product': 'Red Hat JBoss Enterprise Application Platform Expansion Pack', 'packageName': 'zookeeper', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:offline_knowledge_portal:1'], 'vendor': 'Red Hat', 'product': 'Red Hat Offline Knowledge Portal', 'packageName': 'offline-knowledge-portal/rhokp-rhel9', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:openshift_ai'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift AI (RHOAI)', 'packageName': 'rhoai/odh-modelmesh-rhel8', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:amq_streams:3'], 'vendor': 'Red Hat', 'product': 'streams for Apache Kafka 3', 'packageName': 'zookeeper', 'collectionURL': 'https://access.redhat.com/downloads/content/package-browser/', 'defaultStatus': 'affected'}]
  • CVE Modified by 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

    Jul. 03, 2026

    Action Type Old Value New Value
    Added Reference https://access.redhat.com/errata/RHSA-2026:34608
    Changed Affected [{'cpes': ['cpe:/a:redhat:amq_broker:7.12'], 'vendor': 'Red Hat', 'product': 'Red Hat AMQ Broker 7.12.7', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:amq_broker:7.13'], 'vendor': 'Red Hat', 'product': 'Red Hat AMQ Broker 7.13.5', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:amq_broker:7.14'], 'vendor': 'Red Hat', 'product': 'Red Hat AMQ Broker 7.14.0', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:openshift_ai:2.25::el9'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift AI 2.25', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:debezium:2'], 'vendor': 'Red Hat', 'product': 'Red Hat build of Debezium 2', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:debezium:3'], 'vendor': 'Red Hat', 'product': 'Red Hat build of Debezium 3', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:jboss_fuse:7'], 'vendor': 'Red Hat', 'product': 'Red Hat Fuse 7', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:jbosseapxp'], 'vendor': 'Red Hat', 'product': 'Red Hat JBoss Enterprise Application Platform Expansion Pack', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:offline_knowledge_portal:1'], 'vendor': 'Red Hat', 'product': 'Red Hat Offline Knowledge Portal', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:openshift_ai'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift AI (RHOAI)', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:amq_streams:2'], 'vendor': 'Red Hat', 'product': 'streams for Apache Kafka 2', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:amq_streams:3'], 'vendor': 'Red Hat', 'product': 'streams for Apache Kafka 3', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:camel_spring_boot:4'], 'vendor': 'Red Hat', 'product': 'Red Hat build of Apache Camel for Spring Boot 4', 'defaultStatus': 'unaffected'}, {'cpes': ['cpe:/a:redhat:jboss_data_grid:8'], 'vendor': 'Red Hat', 'product': 'Red Hat Data Grid 8', 'defaultStatus': 'unaffected'}, {'cpes': ['cpe:/a:redhat:jboss_enterprise_application_platform:7'], 'vendor': 'Red Hat', 'product': 'Red Hat JBoss Enterprise Application Platform 7', 'defaultStatus': 'unaffected'}, {'cpes': ['cpe:/a:redhat:jboss_enterprise_application_platform:8'], 'vendor': 'Red Hat', 'product': 'Red Hat JBoss Enterprise Application Platform 8', 'defaultStatus': 'unaffected'}] [{'cpes': ['cpe:/a:redhat:amq_broker:7.12'], 'vendor': 'Red Hat', 'product': 'Red Hat AMQ Broker 7.12.7', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:amq_broker:7.13'], 'vendor': 'Red Hat', 'product': 'Red Hat AMQ Broker 7.13.5', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:amq_broker:7.14'], 'vendor': 'Red Hat', 'product': 'Red Hat AMQ Broker 7.14.0', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:openshift_ai:2.25::el9'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift AI 2.25', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:amq_streams:2.9::el9'], 'vendor': 'Red Hat', 'product': 'Streams for Apache Kafka 2.9.4', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:debezium:2'], 'vendor': 'Red Hat', 'product': 'Red Hat build of Debezium 2', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:debezium:3'], 'vendor': 'Red Hat', 'product': 'Red Hat build of Debezium 3', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:jboss_fuse:7'], 'vendor': 'Red Hat', 'product': 'Red Hat Fuse 7', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:jbosseapxp'], 'vendor': 'Red Hat', 'product': 'Red Hat JBoss Enterprise Application Platform Expansion Pack', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:offline_knowledge_portal:1'], 'vendor': 'Red Hat', 'product': 'Red Hat Offline Knowledge Portal', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:openshift_ai'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift AI (RHOAI)', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:amq_streams:3'], 'vendor': 'Red Hat', 'product': 'streams for Apache Kafka 3', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:camel_spring_boot:4'], 'vendor': 'Red Hat', 'product': 'Red Hat build of Apache Camel for Spring Boot 4', 'defaultStatus': 'unaffected'}, {'cpes': ['cpe:/a:redhat:jboss_data_grid:8'], 'vendor': 'Red Hat', 'product': 'Red Hat Data Grid 8', 'defaultStatus': 'unaffected'}, {'cpes': ['cpe:/a:redhat:jboss_enterprise_application_platform:7'], 'vendor': 'Red Hat', 'product': 'Red Hat JBoss Enterprise Application Platform 7', 'defaultStatus': 'unaffected'}, {'cpes': ['cpe:/a:redhat:jboss_enterprise_application_platform:8'], 'vendor': 'Red Hat', 'product': 'Red Hat JBoss Enterprise Application Platform 8', 'defaultStatus': 'unaffected'}]
  • CVE Modified by 0b0ca135-0b70-47e7-9f44-1890c2a1c46c

    Jun. 30, 2026

    Action Type Old Value New Value
    Added Affected [{'cpes': ['cpe:/a:redhat:amq_broker:7.12'], 'vendor': 'Red Hat', 'product': 'Red Hat AMQ Broker 7.12.7', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:amq_broker:7.13'], 'vendor': 'Red Hat', 'product': 'Red Hat AMQ Broker 7.13.5', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:amq_broker:7.14'], 'vendor': 'Red Hat', 'product': 'Red Hat AMQ Broker 7.14.0', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:openshift_ai:2.25::el9'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift AI 2.25', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:debezium:2'], 'vendor': 'Red Hat', 'product': 'Red Hat build of Debezium 2', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:debezium:3'], 'vendor': 'Red Hat', 'product': 'Red Hat build of Debezium 3', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:jboss_fuse:7'], 'vendor': 'Red Hat', 'product': 'Red Hat Fuse 7', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:jbosseapxp'], 'vendor': 'Red Hat', 'product': 'Red Hat JBoss Enterprise Application Platform Expansion Pack', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:offline_knowledge_portal:1'], 'vendor': 'Red Hat', 'product': 'Red Hat Offline Knowledge Portal', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:openshift_ai'], 'vendor': 'Red Hat', 'product': 'Red Hat OpenShift AI (RHOAI)', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:amq_streams:2'], 'vendor': 'Red Hat', 'product': 'streams for Apache Kafka 2', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:amq_streams:3'], 'vendor': 'Red Hat', 'product': 'streams for Apache Kafka 3', 'defaultStatus': 'affected'}, {'cpes': ['cpe:/a:redhat:camel_spring_boot:4'], 'vendor': 'Red Hat', 'product': 'Red Hat build of Apache Camel for Spring Boot 4', 'defaultStatus': 'unaffected'}, {'cpes': ['cpe:/a:redhat:jboss_data_grid:8'], 'vendor': 'Red Hat', 'product': 'Red Hat Data Grid 8', 'defaultStatus': 'unaffected'}, {'cpes': ['cpe:/a:redhat:jboss_enterprise_application_platform:7'], 'vendor': 'Red Hat', 'product': 'Red Hat JBoss Enterprise Application Platform 7', 'defaultStatus': 'unaffected'}, {'cpes': ['cpe:/a:redhat:jboss_enterprise_application_platform:8'], 'vendor': 'Red Hat', 'product': 'Red Hat JBoss Enterprise Application Platform 8', 'defaultStatus': 'unaffected'}]
    Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
    Added CWE CWE-295
    Added Reference https://access.redhat.com/errata/RHSA-2026:10184
    Added Reference https://access.redhat.com/errata/RHSA-2026:14272
    Added Reference https://access.redhat.com/errata/RHSA-2026:14276
    Added Reference https://access.redhat.com/errata/RHSA-2026:8509
    Added Reference https://access.redhat.com/security/cve/CVE-2026-24281
    Added Reference https://bugzilla.redhat.com/show_bug.cgi?id=2445449
    Added Reference https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-24281.json
  • CVE Modified by [email protected]

    Jun. 17, 2026

    Action Type Old Value New Value
    Added Affected [{'vendor': 'Apache Software Foundation', 'product': 'Apache ZooKeeper', 'versions': [{'status': 'affected', 'version': '3.9.0', 'versionType': 'maven', 'lessThanOrEqual': '3.9.4'}, {'status': 'affected', 'version': '3.8.0', 'versionType': 'maven', 'lessThanOrEqual': '3.8.5'}], 'packageName': 'org.apache.zookeeper:zookeeper', 'collectionURL': 'https://repo.maven.apache.org/maven2', 'defaultStatus': 'unaffected'}]
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Jun. 17, 2026

    Action Type Old Value New Value
    Added SSVC {'id': 'CVE-2026-24281', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'partial'}], 'version': '2.0.3', 'timestamp': '2026-03-10T17:36:42.765646Z'}
  • CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0

    Mar. 10, 2026

    Action Type Old Value New Value
    Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
  • Initial Analysis by [email protected]

    Mar. 10, 2026

    Action Type Old Value New Value
    Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
    Added CWE CWE-295
    Added CPE Configuration OR *cpe:2.3:a:apache:zookeeper:*:*:*:*:*:*:*:* versions from (including) 3.8.0 up to (excluding) 3.8.6 *cpe:2.3:a:apache:zookeeper:*:*:*:*:*:*:*:* versions from (including) 3.9.0 up to (excluding) 3.9.5
    Added Reference Type Apache Software Foundation: https://lists.apache.org/thread/088ddsbrzhd5lxzbqf5n24yg0mwh9jt2 Types: Mailing List, Vendor Advisory
    Added Reference Type CVE: http://www.openwall.com/lists/oss-security/2026/03/07/4 Types: Mailing List, Third Party Advisory
  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Mar. 07, 2026

    Action Type Old Value New Value
    Added Reference http://www.openwall.com/lists/oss-security/2026/03/07/4
  • New CVE Received by [email protected]

    Mar. 07, 2026

    Action Type Old Value New Value
    Added 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.
    Added CWE CWE-295
    Added CWE CWE-350
    Added Reference https://lists.apache.org/thread/088ddsbrzhd5lxzbqf5n24yg0mwh9jt2
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CVSS
Vulnerability Scoring Details
Base CVSS Score: 7.4
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact