High severity7.5NVD Advisory· Published Nov 8, 2026

CVE-2026-123580

Description

Hickory DNS hickory-net 0.26.0-beta.1 before 0.26.2 and hickory-proto through 0.26.0-alpha.1 perform insufficient checks on NSEC3 record names during DNSSEC verification, comparing only the hashed label without confirming the record belongs to the correct zone. Attackers can supply NSEC3 records from another zone with a matching hash label to forge DNSSEC nonexistence proofs.

Affected products

Hickory DNS/Hickory DNSllm-fuzzy
Range: <0.26.2, <=0.26.0-alpha.1

Patches

Vulnerability mechanics

References

github.com/hickory-dns/hickory-dns/security/advisories/GHSA-p2jv-r3m3-7wf4nvd
www.vulncheck.com/advisories/hickory-dns-0.26.0-beta.1-before-0.26.2-dnssec-nonexistence-proof-forgery-via-nsec3nvd

News mentions

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cvss	0.488
epss	0.000
exploit	0.000
kev	0.000
patch	-0.070
ransomware	0.000