{
  "cveId": "CVE-2026-67226",
  "url": "https://patchblox.com/security/cve/CVE-2026-67226",
  "summary": "CVE-2026-67226 is fixed in rabbitmq-server on 1 platform by DEBIAN-CVE-2026-67226 (version 4.3.0-2), released September 26, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "RabbitMQ: Admin-only atom exhaustion: PUT /api/users tags list",
  "description": "RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.0.22 and 4.1.14 and 4.2.7, Admin-only atom exhaustion: PUT /api/users tags list. settags/2 maps rabbitdatacoercion:toatom/1 over the user\u0027s tags list. The 20 MB management body limit fits ~3-4M short tag strings. An administrator can crash the node in a single request by creating a user (or importing definitions) with ~1M unique tag administrator. This issue is fixed in versions 4.0.22 and 4.1.14 and 4.2.7.",
  "published": "2026-09-25T17:17:11Z",
  "severity": "Low",
  "cvss": 4.9,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
  "cwe": "Uncontrolled Resource Consumption",
  "epss": 0.00389,
  "epssPercentile": 0.33309,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-67226",
  "fixes": [
    {
      "platform": "linux",
      "product": "rabbitmq-server",
      "release": "Debian 14",
      "fixedVersion": "4.3.0-2",
      "fix": "DEBIAN-CVE-2026-67226",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-67226",
      "released": "2026-09-26T19:52:05Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}