---
id: CVE-2026-24308
title: >-
  Improper handling of configuration values in ZKConfig in Apache ZooKeeper
  3.8.5 and 3.9.4 on all platforms allows an attacker to expose sensitive
  information stored in client configuration in the client's logfile
summary: >-
  Improper handling of configuration values in ZKConfig in Apache ZooKeeper
  3.8.5 and 3.9.4 on all platforms allows an attacker to expose sensitive
  information stored in client configuration in the client's logfile.
  Configuration values ar…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-532
  - CWE-117
vendor: apache
product: zookeeper
affected:
  - 'zookeeper >= 3.8.0, < 3.8.6'
  - 'zookeeper >= 3.9.0, < 3.9.5'
patched:
  - zookeeper 3.9.5
published: '2026-03-07'
updated: '2026-07-03'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-24308'
references:
  - url: 'https://lists.apache.org/thread/qng3rtzv2pqkmko4rhv85jfplkyrgqdr'
    label: security@apache.org
  - url: 'http://www.openwall.com/lists/oss-security/2026/03/07/5'
    label: af854a3a-2127-422b-91ae-364da2661108
  - url: 'https://access.redhat.com/errata/RHSA-2026:10184'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://access.redhat.com/errata/RHSA-2026:14272'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://access.redhat.com/errata/RHSA-2026:14276'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://access.redhat.com/errata/RHSA-2026:34608'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://access.redhat.com/errata/RHSA-2026:8509'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://access.redhat.com/security/cve/CVE-2026-24308'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2445451'
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-24308.json
    label: 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-24308'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-24308'
  - url: 'https://access.redhat.com/errata/RHSA-2026:70421'
tags:
  - nvd
  - csaf
  - vex
  - red-hat
  - score-dispute
epss: 0.01177
epssPercentile: 0.66212
ingestedAt: '2026-07-03T14:03:36.903Z'
scores:
  nvd: 7.5
  vendor: 3.3
---

## Overview

Improper handling of configuration values in ZKConfig in Apache ZooKeeper 3.8.5 and 3.9.4 on all platforms allows an attacker to expose sensitive information stored in client configuration in the client's logfile. Configuration values are exposed at INFO level logging rendering potential production systems affected by the issue. Users are recommended to upgrade to version 3.8.6 or 3.9.5 which fixes this issue.

## Affected

- `zookeeper >= 3.8.0, < 3.8.6`
- `zookeeper >= 3.9.0, < 3.9.5`

## Remediation

Upgrade past the affected range:

- `zookeeper 3.9.5`

## Vendor advisories

- **RHSA-2026:14276** · Red Hat · fixed in: Red Hat AMQ Broker 7.12.7 · released 2026-05-06 · [advisory](https://access.redhat.com/errata/RHSA-2026:14276)
- **RHSA-2026:14272** · Red Hat · fixed in: Red Hat AMQ Broker 7.13.5 · released 2026-05-06 · [advisory](https://access.redhat.com/errata/RHSA-2026:14272)
- **RHSA-2026:8509** · Red Hat · fixed in: Red Hat AMQ Broker 7.14.0 · released 2026-04-16 · [advisory](https://access.redhat.com/errata/RHSA-2026:8509)
- **RHSA-2026:70421** · Red Hat · fixed in: Red Hat JBoss Enterprise Application Platform 6.0.7.GA · released 2026-09-22 · [advisory](https://access.redhat.com/errata/RHSA-2026:70421)
- **RHSA-2026:10184** · Red Hat · fixed in: Red Hat OpenShift AI 2.25 · released 2026-04-23 · [advisory](https://access.redhat.com/errata/RHSA-2026:10184)
- **RHSA-2026:34608** · Red Hat · fixed in: Streams for Apache Kafka 2.9.4 · released 2026-07-02 · [advisory](https://access.redhat.com/errata/RHSA-2026:34608)
- **Red Hat VEX** · Important · affected: Red Hat build of Debezium 2, Red Hat build of Debezium 3, Red Hat Fuse 7, Red Hat JBoss Enterprise Application Platform 7, Red Hat JBoss Enterprise Application Platform Expansion Pack, Red Hat OpenShift AI (RHOAI), … · no fix planned: Red Hat build of Debezium 2, Red Hat build of Debezium 3, Red Hat Fuse 7, Red Hat JBoss Enterprise Application Platform 7, … · updated 2026-09-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-24308.json)