{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-52686", "assignerOrgId": "8ce71d90-2354-404b-a86e-bec2cc4e6981", "state": "PUBLISHED", "assignerShortName": "OX", "dateReserved": "2026-06-08T08:05:31.707Z", "datePublished": "2026-07-23T08:03:37.563Z", "dateUpdated": "2026-07-23T08:03:37.563Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "8ce71d90-2354-404b-a86e-bec2cc4e6981", "shortName": "OX", "dateUpdated": "2026-07-23T08:03:37.563Z"}, "title": "Wildcard CNAME proof validation bypass", "datePublic": "2026-07-21T22:00:00.000Z", "problemTypes": [{"descriptions": [{"lang": "en", "description": "Insufficient Verification of Data Authenticity", "type": "CWE"}]}], "affected": [{"vendor": "PowerDNS", "product": "Recursor", "collectionURL": "https://repo.powerdns.com/", "packageName": "pdns-recursor", "repo": "https://github.com/PowerDNS/pdns", "modules": ["DNSSEC validation"], "programFiles": ["syncres.cc"], "versions": [{"status": "affected", "version": "5.2.0", "lessThan": "5.2.12", "versionType": "semver"}, {"status": "affected", "version": "5.3.0", "lessThan": "5.3.9", "versionType": "semver"}, {"status": "affected", "version": "5.4.0", "lessThan": "5.4.4", "versionType": "semver"}], "defaultStatus": "unaffected"}], "descriptions": [{"lang": "en", "value": "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.", "supportingMedia": [{"type": "text/html", "base64": false, "value": "<p>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.</p>"}]}], "references": [{"url": "https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-10.html"}], "metrics": [{"format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}], "cvssV3_1": {"version": "3.1", "attackVector": "NETWORK", "attackComplexity": "HIGH", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE", "baseSeverity": "LOW", "baseScore": 3.7, "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N"}}], "credits": [{"lang": "en", "value": "Qifan Zhang from Palo Alto Networks", "type": "finder"}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 1.0.4"}}}}

{}

{}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.2.0,5.2.12)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.3.0,5.3.9)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[5.4.0,5.4.4)"}}], "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": "2026-07-23T09:30:16.625494+00:00", "updated": "2026-07-23T09:30:16.625521+00:00", "vendors": ["powerdns", "powerdns$PRODUCT$recursor"]}