pdns-recursor — security advisory

{
  "id": "b346e961d151e8848759454ced199f67718137d5134d84c658f1f6e67c324130",
  "url": "https://osv.dev/vulnerability/DEBIAN-CVE-2026-42389",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "DEBIAN-CVE-2026-42389",
    "summary": "This fix provides extra hardening for the 5.4.x branch by doing extra validation of incoming answers from authoritative servers.",
    "evidence": "osv:DEBIAN-CVE-2026-42389",
    "products": [
      {
        "name": {
          "value": "pdns-recursor",
          "evidence": "/affected/0/package/name"
        },
        "prerequisites": [],
        "fixed_versions": [
          {
            "value": "5.4.3-1",
            "evidence": "/affected/0/ranges"
          }
        ],
        "affected_versions": [
          {
            "value": "5.2.4-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "5.2.5-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "5.3.0-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "5.3.0-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "5.3.0-3",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "5.3.0-4",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "5.3.0-5",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "5.3.1-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "5.3.3-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "5.3.4-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "5.3.4-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "5.3.5-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "5.4.0-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "5.4.1-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "5.4.1-2",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "5.4.2-1",
            "evidence": "/affected/0/versions"
          },
          {
            "value": "5.4.2-2",
            "evidence": "/affected/0/versions"
          }
        ]
      }
    ],
    "severity": "medium",
    "structured": {
      "id": "DEBIAN-CVE-2026-42389",
      "aliases": [
        "DEBIAN-CVE-2026-42389"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "type": "ECOSYSTEM",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "5.4.3-1"
                }
              ]
            }
          ],
          "package": {
            "name": "pdns-recursor",
            "purl": "pkg:deb/debian/pdns-recursor?arch=source&distro=forky",
            "ecosystem": "Debian:14"
          },
          "versions": [
            "5.2.4-2",
            "5.2.5-1",
            "5.3.0-1",
            "5.3.0-2",
            "5.3.0-3",
            "5.3.0-4",
            "5.3.0-5",
            "5.3.1-1",
            "5.3.3-1",
            "5.3.4-1",
            "5.3.4-2",
            "5.3.5-1",
            "5.4.0-1",
            "5.4.1-1",
            "5.4.1-2",
            "5.4.2-1",
            "5.4.2-2"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-42389.json"
          },
          "ecosystem_specific": {
            "urgency": "not yet assigned"
          }
        }
      ],
      "modified": "2026-10-26T11:47:26.378640430Z",
      "provider": "osv",
      "upstream": [
        "CVE-2026-42389"
      ],
      "references": [
        "https://security-tracker.debian.org/tracker/CVE-2026-42389"
      ]
    },
    "related_cves": [
      {
        "value": "CVE-2026-42389",
        "evidence": "/upstream"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 450778,
  "published_at": "2026-06-25T14:16:39.653+00:00"
}