Apache ZooKeeper 3.8.53.9.4 LOG Info Exposure via ZKConfig
CVE-2026-24308 Published on March 7, 2026
Apache ZooKeeper: Sensitive information disclosure in client configuration handling
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.
Weakness Type
Insertion of Sensitive Information into Log File
Information written to log files can be of a sensitive nature and give valuable guidance to an attacker or expose sensitive user information.
Products Associated with CVE-2026-24308
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Affected Versions
Apache Software Foundation Apache ZooKeeper:- Version 3.9.0, <= 3.9.4 is affected.
- Version 3.8.0, <= 3.8.5 is affected.