CVE-2026-52686 — LOW (3.7) — White Hats Nepal

Vulnerability 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.

CVSS Score

3.7

LOW

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

Attack Vector

NETWORK

Attack Complexity

HIGH

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

LOW

Availability

NONE

Related Weaknesses (CWE)

CWE-347

References

https://docs.powerdns.com/recursor/security-advisories/powerdns-advisory-powerdn

FAQ

What is CVE-2026-52686?

CVE-2026-52686 is a vulnerability with a CVSS score of 3.7 (LOW). 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.

How severe is CVE-2026-52686?

CVE-2026-52686 has been rated LOW with a CVSS base score of 3.7/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-52686?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.