{
  "cveId": "CVE-2026-76166",
  "url": "https://patchblox.com/security/cve/CVE-2026-76166",
  "summary": "CVE-2026-76166 is fixed in 3 products on 1 platform, first by RHSA-2026:93618, released September 23, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "jws7-mod_cluster: A flaw was found in mod_cluster\u0027s AdvertiseListenerImpl (org.jboss.modcluster core module)",
  "description": "A flaw was found in mod_cluster\u0027s AdvertiseListenerImpl (org.jboss.modcluster core module). A single crafted UDP multicast datagram with a valid HTTP status line and a \u0022Server:\u0022 header but without the \u0022Date:\u0022, \u0022Digest:\u0022, and \u0022Sequence:\u0022 headers triggers a NullPointerException in verifyDigest() that is not caught by the worker thread\u0027s exception handler. This causes the advertise listener thread to terminate permanently. The failure is silent (isListening() continues to return true) and persists until the node is restarted. The crash occurs before the AdvertiseSecurityKey comparison, so deployments with a configured security key are still affected.",
  "published": "2026-08-04T00:00:00Z",
  "severity": "moderate",
  "cvss": 4.3,
  "epss": 0.02718,
  "epssPercentile": 0.86108,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "jws7-mod_cluster",
      "release": "RHEL 10",
      "fixedVersion": "2.1.1-1.Final_redhat_00001.1.el10jws",
      "fix": "RHSA-2026:93618",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-93618",
      "released": "2026-09-23T12:31:53Z"
    },
    {
      "platform": "linux",
      "product": "jws7-tomcat",
      "release": "RHEL 10",
      "fixedVersion": "11.0.21-10.redhat_00010.1.el10jws",
      "fix": "RHSA-2026:93618",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-93618",
      "released": "2026-09-23T12:31:53Z"
    },
    {
      "platform": "linux",
      "product": "jws7-tomcat-native",
      "release": "RHEL 10",
      "fixedVersion": "1.3.7-4.redhat_4.el10jws",
      "fix": "RHSA-2026:93618",
      "url": "https://patchblox.com/security/fix/linux/rhsa-2026-93618",
      "released": "2026-09-23T12:31:53Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-07T18:46:35Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}