CVE-2026-123591

MediumCVSS 5.9/10Last modified Nov 13, 2026

Description

Hickory DNS hickory-net 0.26.0-beta.1 before 0.26.2 and hickory-proto through 0.26.0-alpha.1 fail to verify, per RFC 6840 §4.4, that an NSEC or NSEC3 record denying a DS RRset also proves the delegation's NS record exists. Attackers can reuse child-side NSEC or NSEC3 records to fake an insecure delegation and forge child-zone records.

Metrics

CVSS 3.1 5.9/10CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

Weakness enumeration

CWE-345

Affected software

Vendor	Product	Versions
hickory-dns	hickory-dns	>= 0.26.0-beta.1, < 0.26.2
hickory-dns	hickory-dns	<= 0.26.0-alpha.1

References

Timeline

Published: Nov 8, 2026
Last modified: Nov 13, 2026
NVD status: Deferred

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