---
id: CVE-2026-123587
title: >-
  Hickory-DNS 0.26.0 before 0.26.2 DNSSEC Nonexistence Forgery via Wraparound
  NSEC
summary: >-
  The DNSSEC validation in the Hickory DNS hickory-net crate 0.26.0 before
  0.26.2 identifies wraparound NSEC records by comparing the next domain name to
  an SOA record in the response, accepting that SOA even if it fails validation.
  Attack…
severity: medium
cvss: 6.8
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N'
cvssSource: cna
cwe:
  - CWE-290
vendor: hickory-dns
product: hickory-dns
affected:
  - hickory-dns >= 0.26.0 < 0.26.2
published: '2026-11-08'
updated: '2026-11-08'
sourceUpdated: '2026-11-08T01:38:19.630Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-123587'
references:
  - url: >-
      https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-qw83-5pm2-ggp5
    label: GitHub Security Advisory (GHSA-qw83-5pm2-ggp5)
  - url: >-
      https://www.vulncheck.com/advisories/hickory-dns-0.26.0-before-0.26.2-dnssec-nonexistence-forgery-via-wraparound-nsec
    label: >-
      VulnCheck Advisory: Hickory-DNS 0.26.0 before 0.26.2 DNSSEC Nonexistence
      Forgery via Wraparound NSEC
tags:
  - cve.org
ingestedAt: '2026-11-08T02:43:18.649Z'
---

## Overview

The DNSSEC validation in the Hickory DNS hickory-net crate 0.26.0 before 0.26.2 identifies wraparound NSEC records by comparing the next domain name to an SOA record in the response, accepting that SOA even if it fails validation. Attackers who can supply DNS responses can combine a genuine NSEC record and its RRSIG with a crafted SOA record to forge nonexistence of any RRset.

## Affected

- `hickory-dns >= 0.26.0 < 0.26.2`

## Remediation

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