CVE-2026-123590
Received Received - Intake

DNSSEC Validation Bypass in Hickory DNS

Publication date: 2026-11-08

Last updated on: 2026-11-08

Assigner: VulnCheck

Description
Hickory DNS hickory-net 0.26.0-beta.1 before 0.26.2 and hickory-proto through 0.26.0-alpha.1 accept NSEC and NSEC3 records for DNSSEC nonexistence proofs when any other record with the same owner name passes signature validation. Attackers able to supply DNS responses can mix validly signed records with bogus same-name NSEC or NSEC3 records of different types in the authority section to forge nonexistence proofs.

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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-2026-123590
EUVD
EUVD-2026-119349

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 (inc) to 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-347 The product does not verify, or incorrectly verifies, the cryptographic signature for data.

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Executive Summary

This vulnerability affects Hickory DNS versions hickory-net 0.26.0-beta.1 before 0.26.2 and hickory-proto through 0.26.0-alpha.1. It allows attackers to forge DNSSEC nonexistence proofs by mixing validly signed records with bogus NSEC or NSEC3 records of different types in the authority section.

Impact Analysis

Attackers could exploit this to provide false DNS responses, potentially redirecting users to malicious sites or disrupting services by falsely claiming certain domain records do not exist.

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 NSEC and NSEC3 record validation issue.

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