{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "5.2.0"
              },
              {
                "fixed": "5.2.12"
              },
              {
                "introduced": "5.3.0"
              },
              {
                "fixed": "5.3.9"
              },
              {
                "introduced": "5.4.0"
              },
              {
                "fixed": "5.4.4"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "544037cd123e8662877b5dc0b7963f5a094a2faf"
            },
            {
              "fixed": "b74225ba558d1f9f91afea21e2496e959b13a869"
            },
            {
              "introduced": "ff33413345dc6a826ff0f37f0c78cd60cdf15689"
            },
            {
              "fixed": "53dfd1af948d1ff716bfd7615c99d442f984f2af"
            },
            {
              "introduced": "c95adbda8ce519923dfdbe7947d82a2692e18af9"
            },
            {
              "fixed": "64c4f00f2b3d4d4153837e0dac7979108bb7749d"
            }
          ],
          "repo": "https://github.com/powerdns/pdns",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "OX",
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52686.json"
  },
  "details": "The issue is a DNSSEC validation bypass where wildcard expansion proofs (NSEC/NSEC3 records) are accepted without signature validation when the wildcard answer is a CNAME or DNAME record.",
  "id": "CVE-2026-52686",
  "modified": "2026-07-28T03:55:48.027563096Z",
  "published": "2026-07-23T08:03:37.563Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://repo.powerdns.com/"
    },
    {
      "type": "ADVISORY",
      "url": "https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-10.html"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/52xxx/CVE-2026-52686.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-52686"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/PowerDNS/pdns"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Wildcard CNAME proof validation bypass"
}