{
  "cveId": "CVE-2026-57216",
  "url": "https://patchblox.com/security/cve/CVE-2026-57216",
  "summary": "CVE-2026-57216 is fixed in rabbitmq-server on 1 platform, first by DEBIAN-CVE-2026-57216, released July 18, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "RabbitMQ: AMQP 1.0, AMQP 0-9-1, Stream Protocol loopback enforcement can lead to remote guest sessions due to listener-address loopback checks",
  "description": "RabbitMQ is a messaging and streaming broker. Prior to 3.13.15, 4.0.20, 4.1.11, and 4.2.6, AMQP 0-9-1, AMQP 1.0, and Stream Protocol authentication can allow a loopback-restricted user such as guest to connect remotely when traffic is accepted through a trusted PROXY-protocol path and the backend listener is loopback-bound because the loopback check uses the listener-side socket address instead of the real client source. This issue is fixed in versions 3.13.15, 4.0.20, 4.1.11, and 4.2.6.",
  "published": "2026-07-10T21:16:58Z",
  "severity": "Moderate",
  "cvss": 10,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H",
  "cwe": "Improper Authentication",
  "epss": 0.00504,
  "epssPercentile": 0.43344,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-57216",
  "fixes": [
    {
      "platform": "linux",
      "product": "rabbitmq-server",
      "release": "Debian 14",
      "fixedVersion": "4.3.0-2",
      "fix": "DEBIAN-CVE-2026-57216",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-57216",
      "released": "2026-07-18T12:42:52Z"
    },
    {
      "platform": "linux",
      "product": "rabbitmq-server",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "4.1.5-160000.2.1",
      "fix": "OPENSUSE-SU-2026:21903-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21903-1",
      "released": "2026-09-22T02:16:57Z"
    },
    {
      "platform": "linux",
      "product": "rabbitmq-server",
      "release": "sles 16.0",
      "fixedVersion": "4.1.5-160000.2.1",
      "fix": "SUSE-SU-2026:23869-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-23869-1",
      "released": "2026-09-22T02:23:51Z"
    }
  ],
  "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"
  }
}