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.
History

Thu, 23 Jul 2026 14:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-347
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 23 Jul 2026 09:45:00 +0000

Type Values Removed Values Added
First Time appeared Powerdns
Powerdns recursor
Vendors & Products Powerdns
Powerdns recursor

Thu, 23 Jul 2026 08:30:00 +0000

Type Values Removed Values Added
Description 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.
Title Wildcard CNAME proof validation bypass
References
Metrics cvssV3_1

{'score': 3.7, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: OX

Published:

Updated: 2026-07-23T13:56:55.653Z

Reserved: 2026-06-08T08:05:31.707Z

Link: CVE-2026-52686

cve-icon Vulnrichment

Updated: 2026-07-23T13:56:50.788Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-07-23T09:30:16Z