CVE-2026-59969(apache / zookeeper)

LOWCVSS 7.5 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD 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.

0.0/ 10 priority

Sources & remediation

Weakness type (CWE)
CWE-297

Priority

LOW

Exploitation

NONE

PoC

NONE

Patch

NONE

Momentum

NONE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • zookeeper

Threat summary

  • 1 mentions across 1 observed day

What's happening

  • 1 total mentions across 1 day

Affected systems

Vendors
Products
zookeeper

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-10-16: 110-16
Full discourse1 post
  • Hossted@Hossted_OSS

    5 vulnerabilities that kept security teams busy in October. In October 2026, five foundational infrastructure tools got hit with vulnerabilities that standard monitoring would not have caught: 🔴 #Kubernetes (CVE-2026-92574): security context bypass allowed users with pod creation privileges to break out of container boundaries. 🔴 #Redis (CVE-2026-92925): improper input validation in the cluster bus packet parser enabled remote denial of service and potential code execution. 🔴 #ApacheActiveMQ (CVE-2026-101292): unsafe reflection flaw allowed unauthenticated remote attackers to execute arbitrary shell commands. 🔴 #ApacheAirflow (CVE-2026-82310): token validation failure allowed deactivated accounts to retain indefinite access to pipelines. 🔴 #ApacheZooKeeper (CVE-2026-59969): TLS hostname verification bypass left cluster traffic vulnerable to man-in-the-middle attacks. A green status indicator means the service is running. It does not mean it is secure. 👇 CVE breakdown and patch details in the first comment. #DevOps #DevSecOps #Kubernetes #CyberSecurity #AppSec #OpenSource #Hossted

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    218 followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appapachezookeeper---

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