{
  "cveId": "CVE-2026-67239",
  "url": "https://patchblox.com/security/cve/CVE-2026-67239",
  "summary": "CVE-2026-67239 is fixed in rabbitmq-server on 1 platform, first by rabbitmq-server 4.0.5-10ubuntu5.2, released September 25, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "RabbitMQ: Stored XSS via TLS peer-certificate DN in stream-management UI",
  "description": "RabbitMQ is a messaging and streaming broker. From 3.13.0 until 3.13.18 and 4.0.23 and 4.1.14 and 4.2.9 and 4.3.3, Stored XSS via TLS peer-certificate DN in stream-management UI (sibling of V-11). lines 102/106/110 render peercertsubject / peercertissuer with raw \u0026lt;%= %\u0026gt; and no fmtstring(). RFC4514 backslash-escaping of \u0026lt;/\u0026gt; is HTML-inert and bypassable (\u0026lt;img ... //\u0026gt;). Requires non-default config: a stream TLS listener with verifypeer and an attacker-obtainable trusted cert with a malicious Same as the connection.ejs finding, against operators viewing the stream-connection detail rabbitmqstream \u002B rabbitmqstreammanagement enabled with a TLS listener using verifypeer Attacker can obtain a certificate signed by a CA the listener trusts, with attacker-chosen DN An operator views the. This issue is fixed in versions 3.13.18 and 4.0.23 and 4.1.14 and 4.2.9 and 4.3.3.",
  "published": "2026-09-25T10:17:00Z",
  "severity": "Moderate",
  "cvss": 5.4,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N",
  "cwe": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
  "epss": 0.00154,
  "epssPercentile": 0.0458,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-67239",
  "fixes": [
    {
      "platform": "linux",
      "product": "rabbitmq-server",
      "release": "Debian 14",
      "fixedVersion": "4.3.6-1",
      "fix": "DEBIAN-CVE-2026-67239",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-67239",
      "released": "2026-10-10T22:48:57Z"
    },
    {
      "platform": "linux",
      "product": "rabbitmq-server",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "3.6.10-1ubuntu0.5\u002Besm1",
      "fix": "rabbitmq-server 3.6.10-1ubuntu0.5\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-rabbitmq-server-3.6.10-1ubuntu0.5-esm1",
      "released": "2026-10-19T16:27:57Z"
    },
    {
      "platform": "linux",
      "product": "rabbitmq-server",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "3.8.3-0ubuntu0.3\u002Besm2",
      "fix": "rabbitmq-server 3.8.3-0ubuntu0.3\u002Besm2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-rabbitmq-server-3.8.3-0ubuntu0.3-esm2",
      "released": "2026-10-19T16:28:02Z"
    },
    {
      "platform": "linux",
      "product": "rabbitmq-server",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "3.9.27-0ubuntu0.6",
      "fix": "rabbitmq-server 3.9.27-0ubuntu0.6",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-rabbitmq-server-3.9.27-0ubuntu0.6",
      "released": "2026-10-19T16:28:05Z"
    },
    {
      "platform": "linux",
      "product": "rabbitmq-server",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "3.12.1-1ubuntu1.7",
      "fix": "rabbitmq-server 3.12.1-1ubuntu1.7",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-rabbitmq-server-3.12.1-1ubuntu1.7",
      "released": "2026-10-19T16:28:08Z"
    },
    {
      "platform": "linux",
      "product": "rabbitmq-server",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "4.0.5-10ubuntu5.2",
      "fix": "rabbitmq-server 4.0.5-10ubuntu5.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-rabbitmq-server-4.0.5-10ubuntu5.2",
      "released": "2026-09-25T10:17:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T00:53:09Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}