CVE-2026-93657

hickory-resolver before 0.26.2 DNSSEC Validation Bypass

Published Sep 18, 2026 CVSS 4.0 · 8.7 High EPSS < 1% KEV · Not listed
Description
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

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Hickory-dns
Hickory-dns hickory-resolver
Vendors & Products Hickory-dns
Hickory-dns hickory-resolver
Type Values Removed Values Added
Description 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.
Title hickory-resolver before 0.26.2 DNSSEC Validation Bypass
Weaknesses CWE-347
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N'}

cvssV4_0

{'score': 8.7, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Sep 21, 2026, 8:51 PM
Reserved
Sep 18, 2026, 1:30 PM
Status
Deferred
Published
Sep 18, 2026, 3:17 PM
Modified
Sep 22, 2026, 8:53 PM
Severity
Important
Public date
Sep 18, 2026, 2:23 PM