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PT-2026-63587

🗓️ 23 Jul 2026 00:00:00Reported by Positive TechnologiesType 
ptsecurity
 ptsecurity🔗 dbugs.ptsecurity.com👁 6 Views

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.

Related
Refs
ReporterTitlePublishedViews
Family
ATTACKERKB		CVE-2026-52686
23 Jul 202608:03
–attackerkb
CVE		CVE-2026-52686
23 Jul 202608:03
–cve
Cvelist		CVE-2026-52686 Wildcard CNAME proof validation bypass
23 Jul 202608:03
–cvelist
Debian CVE		CVE-2026-52686
23 Jul 202608:03
–debiancve
EUVD		EUVD-2026-47931
23 Jul 202608:03
–euvd
NVD		CVE-2026-52686
23 Jul 202609:16
–nvd
OSV		DEBIAN-CVE-2026-52686
22 Jul 202623:48
–osv
OSV		UBUNTU-CVE-2026-52686
23 Jul 202600:00
–osv
Vulnrichment		CVE-2026-52686 Wildcard CNAME proof validation bypass
23 Jul 202608:03
–vulnrichment

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23 Jul 2026 00:00Current
5.3Medium risk
Vulners AI Score5.3
CVSS 3.13.7
6