CVE-2026-24308: 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.
Security readout for executives and security teams
Apache ZooKeeper client configuration can write sensitive values into client logfiles at INFO level. The main business risk is credential or secret exposure through normal production logs. Apache recommends upgrading affected 3.8.5 and 3.9.4 deployments to fixed releases 3.8.6 or 3.9.5. Organizations using Apache ZooKeeper client library org.apache.zookeeper:zookeeper, especially versions 3.8.5 or 3.9.4, may be exposed if client logs are retained, centralized, or readable by users or services beyond the application owner. Treat this as a moderate confidentiality issue. Prioritize systems where ZooKeeper client logs are broadly accessible, shipped to shared logging platforms, or may contain credentials used by production services. Mitigation focus: Upgrade Apache ZooKeeper 3.8.5 to 3.8.6.; Upgrade Apache ZooKeeper 3.9.4 to 3.9.5.; Restrict access to ZooKeeper client logs and centralized logging stores..
Prepared
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Potential ATT&CK relevance
Conservative CVE-to-ATT&CK context
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cwe · low confidence lookup
CWE-117: Exact CWE lookup
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CWE-117 · source CWE mapping
Improper Output Neutralization for Logs
Improper Output Neutralization for Logs represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.
Insertion of Sensitive Information into Log File represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.