---
id: CVE-2026-123600
title: >-
  Hickory DNS hickory-proto 0.25.0-alpha.3 through 0.25.2 NSEC3 Apex NODATA
  Validation Bypass
summary: >-
  Hickory DNS hickory-proto 0.25.0-alpha.3 through 0.25.2 and hickory-net
  0.26.0-alpha.1 before 0.26.2 contain a DNSSEC validation flaw in
  DnssecDnsHandle that accepts NSEC3-signed NODATA responses for zone-apex
  queries as secure without a…
severity: medium
cvss: 4.8
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L'
cvssSource: cna
cwe:
  - CWE-358
vendor: hickory-dns
product: hickory-dns
affected:
  - hickory-dns >= 0.25.0-alpha.3 <= 0.25.2
  - hickory-dns >= 0.26.0-alpha.1 < 0.26.2
published: '2026-11-08'
updated: '2026-11-08'
sourceUpdated: '2026-11-08T01:38:28.487Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-123600'
references:
  - url: >-
      https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-3jvh-8vj5-65rq
    label: GitHub Security Advisory (GHSA-3jvh-8vj5-65rq)
  - url: >-
      https://www.vulncheck.com/advisories/hickory-dns-hickory-proto-0.25.0-alpha.3-through-0.25.2-nsec3-apex-nodata-validation-bypass
    label: >-
      VulnCheck Advisory: Hickory DNS hickory-proto 0.25.0-alpha.3 through
      0.25.2 NSEC3 Apex NODATA Validation Bypass
tags:
  - cve.org
ingestedAt: '2026-11-08T02:43:18.642Z'
---

## Overview

Hickory DNS hickory-proto 0.25.0-alpha.3 through 0.25.2 and hickory-net 0.26.0-alpha.1 before 0.26.2 contain a DNSSEC validation flaw in DnssecDnsHandle that accepts NSEC3-signed NODATA responses for zone-apex queries as secure without an NSEC3 record matching the hashed QNAME. On-path attackers or malicious authoritative servers can replay a validly signed non-apex NSEC3 with the zone's signed SOA to serve an authenticated (AD=1) denial of any apex RRtype for the negative-cache TTL.

## Affected

- `hickory-dns >= 0.25.0-alpha.3 <= 0.25.2`
- `hickory-dns >= 0.26.0-alpha.1 < 0.26.2`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.