{
  "cveId": "CVE-2026-59969",
  "url": "https://patchblox.com/security/cve/CVE-2026-59969",
  "summary": "CVE-2026-59969 is fixed in zookeeper on 1 platform by DEBIAN-CVE-2026-59969 (version 3.9.6-1), released September 26, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "zookeeper: Apache ZooKeeper quorum TLS fails to enforce peer hostname verification in FIPS-mode deployments",
  "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\u00A0are enabled, the Java SSLSocket\u00A0quorum 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.",
  "published": "2026-09-16T10:16:51Z",
  "severity": "high",
  "cvss": 7.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
  "epss": 0.0033,
  "epssPercentile": 0.26246,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "zookeeper",
      "release": "Debian 14",
      "fixedVersion": "3.9.6-1",
      "fix": "DEBIAN-CVE-2026-59969",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-59969",
      "released": "2026-09-26T19:52:05Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}