Security advisory

{
  "id": "d5ca7b9b85435ebdae3e700b7929dc75f590c5b7b849378ba2e278e44187307e",
  "url": "https://osv.dev/vulnerability/CVE-2021-33176",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-33176",
    "summary": "VerneMQ MQTT Broker versions prior to 1.12.0 are vulnerable to a denial of service attack as a result of excessive memory consumption due to the handling of untrusted inputs. These inputs cause the message broker to consume large amounts of memory, resulting in the application being terminated by the operating system.",
    "evidence": "osv:CVE-2021-33176",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-33176",
      "aliases": [
        "CVE-2021-33176"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/vernemq/vernemq",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "d8da843913d699d7be15694a270a11b4ebaab751"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:octavolabs:vernemq:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.12.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.12.0-rc.1",
            "1.11.0",
            "1.10.5",
            "1.10.4",
            "1.10.4.1",
            "1.10.3",
            "1.10.2",
            "1.10.0",
            "1.9.2",
            "1.9.1",
            "1.9.0",
            "1.8.0",
            "1.7.0",
            "1.6.0",
            "1.5.0",
            "1.4.0",
            "1.3.0",
            "1.2.3",
            "1.2.2",
            "1.2.1",
            "1.2.0",
            "1.1.1",
            "1.1.0",
            "1.0.1",
            "1.0.0",
            "1.0.0rc2",
            "1.0.0rc1",
            "0.15.3",
            "0.15.2",
            "0.15.1",
            "0.14.2",
            "0.14.1",
            "0.13.1",
            "0.12.5p5",
            "0.12.5p4",
            "0.12.5p3",
            "0.12.5p2",
            "0.12.5p1",
            "0.12.5",
            "0.12.4",
            "0.12.3",
            "0.12.2",
            "0.12.1",
            "0.11.1",
            "0.11.0",
            "0.10.1",
            "0.10.0",
            "0.9.4"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-33176.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:35.460399319Z",
      "provider": "osv",
      "references": [
        "https://www.synopsys.com/blogs/software-security/cyrc-advisory-rabbitmq-emqx-vernemq"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-33176",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 433740,
  "published_at": "2021-06-08T15:15:07.977+00:00"
}