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CVE-2026-0398

Estado: AnalizadaMedia (5.3)—

Crafted zones can lead to increased resource usage and crafted CNAME chains can lead to cache poisoning in Recursor.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Powerdns — Recursor

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-0398",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-0398",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-02-09T15:36:48.242785Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security@open-xchange.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 5.3,
          "attackVector": "NETWORK",
          "baseSeverity": "MEDIUM",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "LOW",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 1.4,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "security@open-xchange.com",
      "affectedData": [
        {
          "repo": "https://github.com/PowerDNS/pdns",
          "vendor": "PowerDNS",
          "modules": [
            "Synchronous Resolver"
          ],
          "product": "Recursor",
          "versions": [
            {
              "status": "affected",
              "version": "5.3.0",
              "lessThan": "5.3.5",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "5.2.0",
              "lessThan": "5.2.8",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "5.1.0",
              "lessThan": "5.1.10",
              "versionType": "semver"
            }
          ],
          "packageName": "pdns-recursor",
          "programFiles": [
            "syncres.cc"
          ],
          "collectionURL": "https://repo.powerdns.com/",
          "defaultStatus": "unaffected"
        }
      ]
    }
  ],
  "published": "2026-02-09T15:16:11.360",
  "references": [
    {
      "url": "https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-2026-01.html",
      "tags": [
        "Vendor Advisory"
      ],
      "source": "security@open-xchange.com"
    }
  ],
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "type": "Secondary",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "description": [
        {
          "lang": "en",
          "value": "CWE-770"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Crafted zones can lead to increased resource usage and crafted CNAME chains can lead to cache poisoning in Recursor."
    },
    {
      "lang": "es",
      "value": "Zonas manipuladas pueden llevar a un mayor uso de recursos y cadenas CNAME manipuladas pueden llevar a envenenamiento de caché en Recursor."
    }
  ],
  "lastModified": "2026-06-17T10:10:44.590",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:*",
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              "versionEndExcluding": "5.1.10",
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            },
            {
              "criteria": "cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:*",
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              "matchCriteriaId": "707F72F2-1B2F-4DFA-8421-DBDF47980A36",
              "versionEndExcluding": "5.2.8",
              "versionStartIncluding": "5.2.8"
            },
            {
              "criteria": "cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "EE3FB5B9-EB60-473D-9C9D-39787C08BA1B",
              "versionEndExcluding": "5.3.5",
              "versionStartIncluding": "5.3.0"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "security@open-xchange.com"
}