Security advisory

{
  "id": "9e5bfc0043f14ff840fbc846d5a33610adeb6ec3daea9a38beb45b9548d668c2",
  "url": "https://osv.dev/vulnerability/CVE-2021-36754",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-36754",
    "summary": "PowerDNS Authoritative Server 4.5.0 before 4.5.1 allows anybody to crash the process by sending a specific query (QTYPE 65535) that causes an out-of-bounds exception.",
    "evidence": "osv:CVE-2021-36754",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-36754",
      "aliases": [
        "CVE-2021-36754"
      ],
      "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/powerdns/pdns",
              "type": "GIT",
              "events": [
                {
                  "introduced": "8acf42e9ad4c339b7636693ed2d22e305a2e2335"
                },
                {
                  "fixed": "b17a76a74e19601630752453adadcab6f60283b6"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:powerdns:authoritative_server:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "4.5.0"
                      },
                      {
                        "fixed": "4.5.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "rec-4.5.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-36754.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:32.792490968Z",
      "provider": "osv",
      "references": [
        "https://doc.powerdns.com/authoritative/security-advisories/index.html",
        "https://doc.powerdns.com/authoritative/security-advisories/powerdns-advisory-2021-01.html"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-36754",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 433102,
  "published_at": "2021-07-30T14:15:18.253+00:00"
}