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{"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": "2026-04-22T10:16:51.857", "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"}]}, "published": "2026-04-22T10:16:51.857", "references": [{"source": "security@open-xchange.com", "url": "https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-03.html"}], "sourceIdentifier": "security@open-xchange.com", "vulnStatus": "Received"}

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{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.4.0,5.4.1)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.3.0,5.3.6)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.2.0,5.2.9)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "Recursor", "source": "cna", "vendor": "PowerDNS"}, "product": "recursor", "vendor": "powerdns"}], "created": "2026-04-22T11:30:15.169076+00:00", "updated": "2026-04-22T11:30:15.169130+00:00", "vendors": ["powerdns", "powerdns$PRODUCT$recursor"]}