CVEvulnerability

CVE-2026-59969

7.5 HIGH Published 2026-09-16 Modified 2026-09-18 Official page ↗
Status
Analyzed
Published
2026-09-16
Last modified
2026-09-18
Assigner
[email protected]
CVSS 3.1 (134c704f-9b21-4f2e-91b3-4a467353bcc0)
7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Weaknesses
CWE-297

Description

Apache ZooKeeper quorum TLS fails to enforce peer hostname verification in FIPS-mode deployments. When sslQuorum=true, zookeeper.fips-mode=true, ssl.quorum.hostnameVerification=true, and ssl.quorum.clientHostnameVerification=true are enabled, the Java SSLSocket quorum path accepts a CA-trusted peer certificate whose SAN does not match the connected host. A malicious or misissued peer certificate can therefore join quorum traffic, participate in leader election, and enter replication flows. Users are recommended to upgrade to version 3.8.7 or 3.9.6, which fixes the issue.

Affected configurations

• apache zookeeper (>= 3.8.0 < 3.8.7) • apache zookeeper (>= 3.9.0 < 3.9.6)

Related

Weakness · CWE (1)

  • CWE-297 Improper Validation of Certificate with Host Mismatch weakness

References