{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "5.4.0"
              },
              {
                "fixed": "5.4.3"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "c95adbda8ce519923dfdbe7947d82a2692e18af9"
            },
            {
              "fixed": "9f875a6231f22b189c3f03a3c97a910079c47115"
            }
          ],
          "repo": "https://github.com/powerdns/pdns",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "OX",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42389.json"
  },
  "details": "This fix provides extra hardening for the 5.4.x branch by doing extra validation of incoming answers from authoritative servers.",
  "id": "CVE-2026-42389",
  "modified": "2026-07-08T05:38:46.962315781Z",
  "published": "2026-06-25T13:16:45.245Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://repo.powerdns.com/"
    },
    {
      "type": "ADVISORY",
      "url": "https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-08.html"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42389.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42389"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/PowerDNS/pdns"
    }
  ],
  "schema_version": "1.7.5",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Reject more queries with invalid header values"
}