MediumFix available

RabbitMQ: Stored HTML Injection in RabbitMQ Management OAuth Error Handling

Type: advisorySources: OSV

RabbitMQ is a messaging and streaming broker. From 3.13.0 until 3.13.19, 4.0.24, 4.1.15, 4.2.10, and 4.3.5, RabbitMQ Management rendered an AMQP authorization-error reason containing an attacker-controlled queue name as HTML when the OAuth management UI was enabled. Exploitation requires an attacker with queue configure permission, a management administrator who can see but cannot read that queue, and the administrator clicking Get Message(s). A queue name containing a base element can then retarget the automatic relative refresh because the Content Security Policy omits base-uri and connect-src, and an attacker endpoint that permits the management origin through CORS can receive the victim's Authorization header. This issue is fixed in versions 3.13.19, 4.0.24, 4.1.15, 4.2.10, and 4.3.5.

Products: rabbitmq
Affected versions: Not specified
Fixed versions: 3.13.19, 4.0.24, 4.1.15, 4.2.10, 4.3.5
CVEs: CVE-2026-67421
Confirmed fixed CVEs: Not specified
Updated in this feed: 28 Oct 2026, 04:12 UTC · Revision 1

Source evidence

RabbitMQ: Stored HTML Injection in RabbitMQ Management OAuth Error Handling

core-osv · Original source

Published 1 Oct 2026, 09:34 UTC

osv:BIT-rabbitmq-2026-67421

rabbitmq

Fixed versions: 3.13.19, 4.0.24, 4.1.15, 4.2.10, 4.3.5

Complete source record

{
  "id": "25c30c0568d6814cf6bc625dbbaea43ac1fd51cc9bb98748f84560bfe69bf7a2",
  "url": "https://osv.dev/vulnerability/BIT-rabbitmq-2026-67421",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "RabbitMQ: Stored HTML Injection in RabbitMQ Management OAuth Error Handling",
    "summary": "RabbitMQ is a messaging and streaming broker. From 3.13.0 until 3.13.19, 4.0.24, 4.1.15, 4.2.10, and 4.3.5, RabbitMQ Management rendered an AMQP authorization-error reason containing an attacker-controlled queue name as HTML when the OAuth management UI was enabled. Exploitation requires an attacker with queue configure permission, a management administrator who can see but cannot read that queue, and the administrator clicking Get Message(s). A queue name containing a base element can then retarget the automatic relative refresh because the Content Security Policy omits base-uri and connect-src, and an attacker endpoint that permits the management origin through CORS can receive the victim's Authorization header. This issue is fixed in versions 3.13.19, 4.0.24, 4.1.15, 4.2.10, and 4.3.5.",
    "evidence": "osv:BIT-rabbitmq-2026-67421",
    "products": [
      {
        "name": {
          "value": "rabbitmq",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "3.13.19",
            "evidence": "/affected/0/ranges"
          },
          {
            "value": "4.0.24",
            "evidence": "/affected/0/ranges"
          },
          {
            "value": "4.1.15",
            "evidence": "/affected/0/ranges"
          },
          {
            "value": "4.2.10",
            "evidence": "/affected/0/ranges"
          },
          {
            "value": "4.3.5",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": []
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "BIT-rabbitmq-2026-67421",
      "aliases": [
        "BIT-rabbitmq-2026-67421",
        "CVE-2026-67421",
        "GHSA-6256-27fm-4rgr"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "SEMVER",
              "events": [
                {
                  "introduced": "3.13.0"
                },
                {
                  "fixed": "3.13.19"
                },
                {
                  "introduced": "4.0.0"
                },
                {
                  "fixed": "4.0.24"
                },
                {
                  "introduced": "4.1.0"
                },
                {
                  "fixed": "4.1.15"
                },
                {
                  "introduced": "4.2.0"
                },
                {
                  "fixed": "4.2.10"
                },
                {
                  "introduced": "4.3.0"
                },
                {
                  "fixed": "4.3.5"
                }
              ]
            }
          ],
          "package": {
            "name": "rabbitmq",
            "purl": "pkg:bitnami/rabbitmq",
            "ecosystem": "Bitnami"
          },
          "severity": [
            {
              "type": "CVSS_V4",
              "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:L/VI:L/VA:N/SC:H/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
            }
          ],
          "database_specific": {
            "source": "https://github.com/bitnami/vulndb/tree/main/data/rabbitmq/BIT-rabbitmq-2026-67421.json"
          }
        }
      ],
      "modified": "2026-10-07T14:30:05.097261408Z",
      "provider": "osv",
      "references": [
        "https://github.com/rabbitmq/rabbitmq-server/commit/ff595eaaa6d4f580f72fa04801ffd35f48c46027",
        "https://github.com/rabbitmq/rabbitmq-server/releases/tag/v4.3.5",
        "https://github.com/rabbitmq/rabbitmq-server/security/advisories/GHSA-6256-27fm-4rgr",
        "https://nvd.nist.gov/vuln/detail/CVE-2026-67421"
      ],
      "provider_metadata": {
        "cpes": [
          "cpe:2.3:a:vmware:rabbitmq:*:*:*:*:*:*:*:*"
        ],
        "severity": "Medium"
      }
    },
    "related_cves": [
      {
        "value": "CVE-2026-67421",
        "evidence": "/aliases"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/database_specific/severity"
  },
  "source_id": "core-osv",
  "document_id": 95089,
  "published_at": "2026-10-01T09:34:00.722+00:00"
}