FKIE_CVE-2026-33261

Vulnerability from fkie_nvd - Published: 2026-04-22 10:16 - Updated: 2026-06-17 10:37
Severity
5.9 (Medium) - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
A zone transition from NSEC to NSEC3 might trigger an internal inconsistency and cause a denial of service.
References
security@open-xchange.comhttps://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-03.htmlBroken Link, Vendor Advisory
Impacted products
Vendor Product Version
powerdns recursor *
powerdns recursor *
powerdns recursor 5.4.0
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "collectionURL": "https://repo.powerdns.com/",
          "defaultStatus": "unaffected",
          "modules": [
            "Aggressive use of NSEC cache"
          ],
          "packageName": "pdns-recursor",
          "product": "Recursor",
          "programFiles": [
            "aggressive_nsec.cc"
          ],
          "repo": "https://github.com/PowerDNS/pdns",
          "vendor": "PowerDNS",
          "versions": [
            {
              "lessThan": "5.4.1",
              "status": "affected",
              "version": "5.4.0",
              "versionType": "semver"
            },
            {
              "lessThan": "5.3.6",
              "status": "affected",
              "version": "5.3.0",
              "versionType": "semver"
            },
            {
              "lessThan": "5.2.9",
              "status": "affected",
              "version": "5.2.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "source": "security@open-xchange.com"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "EBDA7C62-FAD4-470C-A6FE-4CF19B0BD4AD",
              "versionEndExcluding": "5.2.9",
              "versionStartIncluding": "5.2.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:*",
              "matchCriteriaId": "9F7AC884-348F-47B1-8853-49BFEDBEA9EA",
              "versionEndExcluding": "5.3.6",
              "versionStartIncluding": "5.3.0",
              "vulnerable": true
            },
            {
              "criteria": "cpe:2.3:a:powerdns:recursor:5.4.0:*:*:*:*:*:*:*",
              "matchCriteriaId": "4B201BAD-5A74-45E9-91FD-5E950BA18BF3",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A zone transition from NSEC to NSEC3 might trigger an internal inconsistency and cause a denial of service."
    }
  ],
  "id": "CVE-2026-33261",
  "lastModified": "2026-06-17T10:37:12.900",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "HIGH",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 5.9,
          "baseSeverity": "MEDIUM",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 3.6,
        "source": "security@open-xchange.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-33261",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-04-22T17:52:56.932119Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-04-22T10:16:51.857",
  "references": [
    {
      "source": "security@open-xchange.com",
      "tags": [
        "Broken Link",
        "Vendor Advisory"
      ],
      "url": "https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-03.html"
    }
  ],
  "sourceIdentifier": "security@open-xchange.com",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-353"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}



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