CVE-2026-66078 affecting package rabbitmq-server 3.13.7-9

{
  "id": "e815775c4bcbc9f906dce40a29b230bcea8e1fb3c509ed6c4fd7745245e3bd9a",
  "url": "https://osv.dev/vulnerability/AZL-105287",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2026-66078 affecting package rabbitmq-server 3.13.7-9",
    "summary": "RabbitMQ is a messaging and streaming broker. From 3.13.0 until 3.13.15 and 4.0.20 and 4.1.11 and 4.2.6, protected tag bypass via bulk-delete. dELETE /api/users/:name refuses to delete users tagged protected (rabbitmgmtwmuser:deleteresource/2 checks isprotecteduser). POST /api/users/bulk-delete iterates the supplied username list and calls rabbitauthbackendinternal:deleteuser/2 directly , that function has no protected-tag check , so the guard is silently An administrator can delete protected-tagged service accounts via the bulk endpoint, bypassing a safeguard the test suite confirms is rabbitmqmanagement enabled Attacker has the administrator tag A protected-tagged user. This issue is fixed in versions 3.13.15 and 4.0.20 and 4.1.11 and 4.2.6.",
    "evidence": "osv:AZL-105287",
    "products": [
      {
        "name": {
          "value": "rabbitmq-server",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": []
      }
    ],
    "severity": "unknown",
    "structured": {
      "id": "AZL-105287",
      "aliases": [
        "AZL-105287"
      ],
      "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-105287.json"
          }
        }
      ],
      "modified": "2026-10-15T05:37:09Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-66078"
      ],
      "references": [
        "https://nvd.nist.gov/vuln/detail/CVE-2026-66078"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-66078",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "core-osv",
  "document_id": 321294,
  "published_at": "2026-09-25T17:17:10+00:00"
}