CVE-2026-24308
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.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.18%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 1.18% probability · 66th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-532, CWE-117
- Affected
- apache/zookeeper
- Source
- security@apache.org
References
- https://lists.apache.org/thread/qng3rtzv2pqkmko4rhv85jfplkyrgqdrMailing List, Vendor Advisory
- http://www.openwall.com/lists/oss-security/2026/03/07/5Mailing List, Third Party Advisory
- https://access.redhat.com/errata/RHSA-2026:10184
- https://access.redhat.com/errata/RHSA-2026:14272
- https://access.redhat.com/errata/RHSA-2026:14276
- https://access.redhat.com/errata/RHSA-2026:34608
- https://access.redhat.com/errata/RHSA-2026:8509
- https://access.redhat.com/security/cve/CVE-2026-24308
- https://bugzilla.redhat.com/show_bug.cgi?id=2445451
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-24308.json
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.