VYPR
← All advisories
High severity7.5NVD Advisory· Published Sep 16, 2026· Updated Sep 18, 2026

CVE-2026-59969

CVE-2026-59969

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

3
  • Apache/Zookeeperllm-fuzzy2 versions
    up to 3.8.7 and 3.9.6+ 1 more
    • (no CPE)range: up to 3.8.7 and 3.9.6
    • cpe:2.3:a:apache:zookeeper:*:*:*:*:*:*:*:*range: >=3.8.0,<3.8.7
  • osv-coords
    pkg:bitnami/zookeeper
    Range: >= 3.8.0, < 3.8.7

Patches

Vulnerability mechanics

References

2

News mentions

0

No linked articles in our index yet.