What is GHSA-4vjf-x5x5-8f5h?

GHSA-4vjf-x5x5-8f5h is a security advisory published by GitHub Security Advisories with High severity. The Hickory DNS recursor in all versions of hickory-recursor and in hickory-resolver 0.26.0-beta...

Which CVE IDs does GHSA-4vjf-x5x5-8f5h cover?

GHSA-4vjf-x5x5-8f5h covers the following CVE IDs: CVE-2026-123602. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of GHSA-4vjf-x5x5-8f5h?

GHSA-4vjf-x5x5-8f5h has a CVSS v3 base score of 5.9, published by GitHub Security Advisories.

GHSA-4vjf-x5x5-8f5hHighCVSS 5.9

The Hickory DNS recursor in all versions of hickory-recursor and in hickory-resolver 0.26.0-beta...

Vendor

GitHub Security Advisories

Published

November 8, 2026

Last Modified

November 8, 2026

🔗 CVE IDs covered (1)

CVE-2026-123602 →

📋 Description

The Hickory DNS recursor in all versions of hickory-recursor and in hickory-resolver 0.26.0-beta.1 before 0.26.2 (recursor feature) is vulnerable to ghost domain names attacks because it reuses child-side apex NS RRsets cached from zone NS queries for iterative resolution. By repeatedly querying a zone's NS records, an attacker keeps the stale RRset cached indefinitely, letting name servers whose delegation the parent revoked keep answering for the zone.

🔗 References (4)

https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-2hxp-x833-73f7
https://nvd.nist.gov/vuln/detail/CVE-2026-123602
https://www.vulncheck.com/advisories/hickory-dns-recursor-ghost-domain-attack-via-child-side-ns-rrset-caching
https://github.com/advisories/GHSA-4vjf-x5x5-8f5h