---
id: CVE-2026-123592
title: >-
  Hickory DNS 0.26.0-beta.1 before 0.26.2 DNSSEC Validation Bypass via Name Hash
  Collision
summary: >-
  The hickory-net crate in Hickory DNS 0.26.0-beta.1 before 0.26.2 allows DNSSEC
  validation bypass because Name's Hash ignores label lengths and
  ValidationCacheKey compares only that hash. An attacker controlling an
  unsigned delegation who…
severity: medium
cvss: 5.9
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N'
cvssSource: cna
cwe:
  - CWE-1025
vendor: hickory-dns
product: hickory-dns
affected:
  - hickory-dns >= 0.26.0-beta.1 < 0.26.2
published: '2026-11-08'
updated: '2026-11-08'
sourceUpdated: '2026-11-08T01:38:23.037Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-123592'
references:
  - url: >-
      https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-rx82-4p2j-j5cv
    label: GitHub Security Advisory (GHSA-rx82-4p2j-j5cv)
  - url: >-
      https://www.vulncheck.com/advisories/hickory-dns-0.26.0-beta.1-before-0.26.2-dnssec-validation-bypass-via-name-hash-collision
    label: >-
      VulnCheck Advisory: Hickory DNS 0.26.0-beta.1 before 0.26.2 DNSSEC
      Validation Bypass via Name Hash Collision
tags:
  - cve.org
ingestedAt: '2026-11-08T02:43:18.645Z'
---

## Overview

The hickory-net crate in Hickory DNS 0.26.0-beta.1 before 0.26.2 allows DNSSEC validation bypass because Name's Hash ignores label lengths and ValidationCacheKey compares only that hash. An attacker controlling an unsigned delegation whose name differs from a signed target only in dot positions can prime an Insecure verdict, causing forged answers for the target to skip signature verification instead of returning SERVFAIL.

## Affected

- `hickory-dns >= 0.26.0-beta.1 < 0.26.2`

## Remediation

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