---
id: CVE-2026-93657
title: >-
  hickory-resolver versions before 0.26.2 fail to propagate bogus DNSSEC proof
  states through the Resolver::lookup() and Resolver::lookup_ip() APIs, allowing
  invalid records to be returned as successful results
summary: >-
  hickory-resolver versions before 0.26.2 fail to propagate bogus DNSSEC proof
  states through the Resolver::lookup() and Resolver::lookup_ip() APIs, allowing
  invalid records to be returned as successful results. Attackers controlling
  the a…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N'
cwe:
  - CWE-347
  - CWE-354
vendor: hickory-dns
product: hickory-resolver
affected:
  - hickory-resolver < 0.26.2
published: '2026-09-18'
updated: '2026-09-22'
sourceUpdated: '2026-09-22T20:53:07.383'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93657'
references:
  - url: 'https://github.com/hickory-dns/hickory-dns'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/hickory-dns/hickory-dns/commit/30720f4fb22e5556ecbf26d2c8274ea4a9fdd238
    label: disclosure@vulncheck.com
  - url: 'https://github.com/hickory-dns/hickory-dns/pull/3871'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/hickory-dns/hickory-dns/releases/tag/v0.26.2'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-5j98-2g5x-46v6
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/hickory-resolver-before-0.26.2-dnssec-validation-bypass
    label: disclosure@vulncheck.com
  - url: >-
      https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93657.json
  - url: 'https://access.redhat.com/security/cve/CVE-2026-93657'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2538208'
  - url: 'https://www.cve.org/CVERecord?id=CVE-2026-93657'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-93657'
tags:
  - nvd
  - cve.org
  - csaf
  - vex
  - red-hat
epss: 0.00401
epssPercentile: 0.31566
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-09-21T16:28:49.154433Z'
ingestedAt: '2026-09-18T14:43:13.070Z'
---

## Overview

hickory-resolver versions before 0.26.2 fail to propagate bogus DNSSEC proof states through the Resolver::lookup() and Resolver::lookup_ip() APIs, allowing invalid records to be returned as successful results. Attackers controlling the answering zone or positioned on the network path can have forged DNS records accepted as validated, bypassing DNSSEC authentication checks.

## Remediation

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

## Vendor advisories

- **Red Hat VEX** · Important · affected: Logging Subsystem for Red Hat OpenShift, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, Red Hat Hardened Images, Red Hat OpenShift AI (RHOAI), Red Hat OpenShift Update Service, … · no fix planned: Red Hat Trusted Profile Analyzer, Logging Subsystem for Red Hat OpenShift, Red Hat Enterprise Linux 10, Red Hat Enterprise Linux 9, … · updated 2026-09-23 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-93657.json)