UnratedApache Software Foundation

Advisory [CVE-2026-24308] Apache ZooKeeper: Sensitive information disclosure in client configuration handling

This security Apache Software Foundation advisory covers CVE-2026-24308 affecting Apache ZooKeeper.

CVE-2026-24308 Published Mar 7, 2026Updated by vendor Jul 15, 2026

CVE-2026-24308

Affected products & platforms

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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 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 versions

Apache ZooKeeper 3.9.0 through 3.9.4
Apache ZooKeeper 3.8.0 through 3.8.5

Official advisory · medium-confidence parse· fetched 2 months ago·verify at source

Fixed versions

3.8.6
3.9.5

Official advisory · medium-confidence parse· fetched 2 months ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Users are recommended to upgrade to version 3.8.6 or 3.9.5 which fixes this issue.

Official advisory · medium-confidence parse· fetched 2 months ago·verify at source

Sources

Official and corroborating records used to build this advisory.

Official vendor advisoryofficial
Official advisory page fetched and parsed for the summary, affected/fixed versions and remediation guidance it provides.
Apache Software Foundation
CVE.org CNA recordCVE.org
Independent CNA record used for near-real-time discovery and missed-CVE reconciliation. Discovered from the machine-readable feed https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/delta.json; this link opens the CVE.org record for CVE-2026-24308 instead of the raw feed document.
CVE Program

Cross-references

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CVE-2026-24308NVD CVE.org MITRE

Official resources

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