CVE-2026-123579
Received Received - Intake

DNSSEC Validation Bypass in Hickory DNS

Publication date: 2026-11-08

Last updated on: 2026-11-08

Assigner: VulnCheck

Description
DNSSEC validation in Hickory DNS hickory-net 0.26.0-beta.1 before 0.26.2 and hickory-proto through 0.26.0-alpha.1 does not distinguish NODATA responses from wildcard-expanded positive responses. For a query that should return NODATA in a zone with wildcard records, an attacker can combine an NSEC3 record matching the query name with a signed wildcard record into a bogus positive response that validation accepts.

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Meta Information

Published
2026-11-08
Last Modified
2026-11-08
Generated
2026-11-08
AI Q&A
2026-11-08
EPSS Evaluated
N/A
NVD
CVE-2026-123579
EUVD
EUVD-2026-119338

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
hickory_net hickory_dns to 0.26.2 (exc)
hickory_net hickory_proto From 0.26.0_alpha.1 (inc)

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Exploitability

CWE
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KEV
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CWE ID Description
CWE-358 The product does not implement or incorrectly implements one or more security-relevant checks as specified by the design of a standardized algorithm, protocol, or technique.

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Executive Summary

DNSSEC validation in Hickory DNS versions before 0.26.2 fails to properly handle NODATA responses when wildcard records are present. An attacker can exploit this by crafting a response that combines an NSEC3 record with a signed wildcard record, tricking validation into accepting a false positive response instead of correctly identifying a NODATA scenario.

Impact Analysis

This vulnerability could allow attackers to redirect users to malicious sites by bypassing DNSSEC validation. Users relying on Hickory DNS for secure DNS queries might unknowingly connect to incorrect or harmful servers, leading to potential data interception or phishing attacks.

Mitigation Strategies

Update Hickory DNS hickory-net to version 0.26.2 or later and hickory-proto to a version beyond 0.26.0-alpha.1 to address the DNSSEC validation flaw.

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