CVE-2026-24308

Apache ZooKeeper: Sensitive information disclosure in client configuration handling

State: Published
Severity: 6.5 Medium
Published: Mar 7, 2026
Updated: Jul 15, 2026
Reserved: Jan 21, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	6.5 Medium	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N	CISA-ADP
3.1	3.3 Low	CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N	redhat-SADP

Weaknesses

CWE-532 Insertion of Sensitive Information into Log File
CWE-117 Improper Output Neutralization for Logs

Affected Products

Product	Versions
Apache ZooKeeperApache Software Foundation	3.9.0 through 3.9.4Affected 3.8.0 through 3.8.5Affected

References

https://lists.apache.org/thread/qng3rtzv2pqkmko4rhv85jfplkyrgqdrvendor-advisory
http://www.openwall.com/lists/oss-security/2026/03/07/5
https://access.redhat.com/security/cve/CVE-2026-24308vdb-entry
RHBZ#2445451issue-tracking
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-24308.json
https://access.redhat.com/errata/RHSA-2026:14276vendor-advisory
https://access.redhat.com/errata/RHSA-2026:14272vendor-advisory
https://access.redhat.com/errata/RHSA-2026:8509vendor-advisory
https://access.redhat.com/errata/RHSA-2026:10184vendor-advisory
https://access.redhat.com/errata/RHSA-2026:34608vendor-advisory

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