Apache ZooKeeper has improper handling of configuration values
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 software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | org.apache.zookeeper:zookeeper | >= 3.9.0, < 3.9.5, >= 3.8.0, < 3.8.6 | 3.9.5, 3.8.6 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2026-24308
- https://github.com/apache/zookeeper
- https://github.com/apache/zookeeper/releases/tag/release-3.8.6
- https://github.com/apache/zookeeper/releases/tag/release-3.9.5
- https://lists.apache.org/thread/qng3rtzv2pqkmko4rhv85jfplkyrgqdr
- http://www.openwall.com/lists/oss-security/2026/03/07/5
- CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N- Weakness (CWE)
CWE-532- Platform
- Java / Kotlin (Maven)
- Package
org.apache.zookeeper:zookeeper- Disclosed
- 07.03.2026
- Updated
- 11.10.2026 13:20
Sources and licenses
OSV / GitHub Advisory Database - GHSA-crhr-qqj8-rpxc - CC BY 4.0
Vulnerability history: org.apache.zookeeper:zookeeper
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 9
- First → latest
- 05.2019 03.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 1
- High 5
- Medium 3
Disclosures per year
- 2019: 1
- 2020: 0
- 2021: 0
- 2022: 2
- 2023: 1
- 2024: 2
- 2025: 1
- 2026: 2
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Apache ZooKeeper has improper handling of configuration values this entry
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