CVE-2026-67407 affecting package rabbitmq-server 3.13.7-9

{
  "id": "f28eb797aa93fc0f39cf6e47433062fc4e237c8acff2f7e34fa8ae72e5e6a2a2",
  "url": "https://osv.dev/vulnerability/AZL-105320",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-67407 affecting package rabbitmq-server 3.13.7-9",
    "summary": "RabbitMQ is a messaging and streaming broker. From 4.0.0 until 4.3.3 and 4.2.9 and 4.1.14 and 4.0.23, Incomplete fix for CVE-2026-44838: escaperegexchar/1 does not escape -, leaving room for an MQTT topic permission bypass. the CVE-2026-44838 fix made expandtopicpermission/2 escape regex metacharacters in expanded topic-permission variables (escaperegex(V)), but escaperegexchar/1 escapes \\ ^ $ . | ? + ( ) [ ] { } and omits -. When a topic permission template places {clientid} inside a [...] character class A low-privileged authenticated MQTT user controlling its clientid can broaden topic authorization (read and write) when templates embed {clientid} in a [...] This issue is fixed in versions 4.3.3 and 4.2.9 and 4.1.14 and 4.0.23.",
    "evidence": "osv:AZL-105320",
    "products": [
      {
        "name": {
          "value": "rabbitmq-server",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "AZL-105320",
      "aliases": [
        "AZL-105320"
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "3.13.7-9"
                }
              ]
            }
          ],
          "package": {
            "name": "rabbitmq-server",
            "purl": "pkg:rpm/azure-linux/rabbitmq-server",
            "ecosystem": "Azure Linux:3"
          },
          "database_specific": {
            "source": "https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-105320.json"
          }
        }
      ],
      "modified": "2026-10-15T05:37:09Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-67407"
      ],
      "references": [
        "https://nvd.nist.gov/vuln/detail/CVE-2026-67407"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-67407",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 321296,
  "published_at": "2026-09-25T17:17:12+00:00"
}