CVE-2026-52686 — Wildcard CNAME proof validation bypass

CVE-2026-52686

Wildcard CNAME proof validation bypass PUBLISHED

Description (CNA)

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.

Affected (CNA)

Vendor / product	Versions
PowerDNS / Recursor	affected 5.2.0 before 5.2.12; affected 5.3.0 before 5.3.9; affected 5.4.0 before 5.4.4

CWE

No CWE identifiers supplied.

References

https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdns-2026-10.html

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.