Update dependency org.apache.zookeeper:zookeeper to v3.9.5 [SECURITY] - abandoned

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
org.apache.zookeeper:zookeeper (source)	3.9.4 → 3.9.5

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Apache ZooKeeper has improper handling of configuration values

BIT-zookeeper-2026-24308 / CVE-2026-24308 / GHSA-crhr-qqj8-rpxc

More information

Details

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.

Severity

• CVSS Score: 8.7 / 10 (High)
• Vector String: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

References

• https://nvd.nist.gov/vuln/detail/CVE-2026-24308
• https://github.com/apache/zookeeper
• https://github.com/apache/zookeeper/releases/tag/release-3.8.6
• https://github.com/apache/zookeeper/releases/tag/release-3.9.5
• https://lists.apache.org/thread/qng3rtzv2pqkmko4rhv85jfplkyrgqdr
• http://www.openwall.com/lists/oss-security/2026/03/07/5

This data is provided by OSV and the GitHub Advisory Database (CC-BY 4.0).

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Apache ZooKeeper: Reverse-DNS fallback enables hostname verification bypass in ZooKeeper ZKTrustManager

BIT-zookeeper-2026-24281 / CVE-2026-24281 / GHSA-7xrh-hqfc-g7qr

More information

Details

Hostname verification in Apache ZooKeeper ZKTrustManager falls back to reverse DNS (PTR) when IP SAN validation fails, allowing attackers who control or spoof PTR records to impersonate ZooKeeper servers or clients with a valid certificate for the PTR name. It's important to note that attacker must present a certificate which is trusted by ZKTrustManager which makes the attack vector harder to exploit. Users are recommended to upgrade to version 3.8.6 or 3.9.5, which fixes this issue by introducing a new configuration option to disable reverse DNS lookup in client and quorum protocols.

Severity

• CVSS Score: 7.4 / 10 (High)
• Vector String: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

References

• https://nvd.nist.gov/vuln/detail/CVE-2026-24281
• https://github.com/apache/zookeeper/commit/66c4efecdda1302d9cfb3af9eedb122b74452bf3
• https://github.com/apache/zookeeper
• https://issues.apache.org/jira/browse/ZOOKEEPER-4986
• https://lists.apache.org/thread/088ddsbrzhd5lxzbqf5n24yg0mwh9jt2
• http://www.openwall.com/lists/oss-security/2026/03/07/4

This data is provided by OSV and the GitHub Advisory Database (CC-BY 4.0).

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[hmusum]

Issue has been fixed