---
id: CVE-2026-123598
title: Hickory DNS 0.25.0 through 0.26.0-alpha.1 DNSSEC Bogus Answer Cache Poisoning
summary: >-
  The validating recursor in Hickory DNS hickory-recursor 0.25.0 through
  0.26.0-alpha.1, hickory-resolver 0.26.0-alpha.1 before 0.26.2, and hickory-net
  0.26.0-beta.1 before 0.26.2 caches DNSSEC-bogus answers using the untrusted,
  attacker-s…
severity: low
cvss: 3.7
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L'
cvssSource: cna
cwe:
  - CWE-613
vendor: hickory-dns
product: hickory-dns
affected:
  - hickory-dns >= 0.25.0 <= 0.26.0-alpha.1
  - hickory-dns >= 0.26.0-alpha.1 < 0.26.2
  - hickory-dns >= 0.26.0-beta.1 < 0.26.2
published: '2026-11-08'
updated: '2026-11-08'
sourceUpdated: '2026-11-08T01:38:27.111Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-123598'
references:
  - url: >-
      https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-29q9-p769-j8gq
    label: GitHub Security Advisory (GHSA-29q9-p769-j8gq)
  - url: >-
      https://www.vulncheck.com/advisories/hickory-dns-0.25.0-through-0.26.0-alpha.1-dnssec-bogus-answer-cache-poisoning
    label: >-
      VulnCheck Advisory: Hickory DNS 0.25.0 through 0.26.0-alpha.1 DNSSEC Bogus
      Answer Cache Poisoning
tags:
  - cve.org
ingestedAt: '2026-11-08T02:43:18.646Z'
---

## Overview

The validating recursor in Hickory DNS hickory-recursor 0.25.0 through 0.26.0-alpha.1, hickory-resolver 0.26.0-alpha.1 before 0.26.2, and hickory-net 0.26.0-beta.1 before 0.26.2 caches DNSSEC-bogus answers using the untrusted, attacker-supplied record TTL (capped at 24 hours) instead of a short validation-failure TTL. A remote attacker who spoofs a single authoritative response with an invalid signature and a long TTL can keep the bogus result cached for up to 24 hours.

## Affected

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

## Remediation

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