{"id":"CVE-2026-123602","title":"Hickory DNS Recursor Ghost Domain Attack via Child-Side NS RRset Caching","summary":"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 …","severity":"medium","cvss":5.9,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N","cvssSource":"cna","cwe":["CWE-672"],"vendor":"hickory-dns","product":"hickory-dns","affected":["hickory-dns <= 0.26.0-alpha.1","hickory-dns >= 0.26.0-beta.1 < 0.26.2"],"published":"2026-11-08","updated":"2026-11-08","sourceUpdated":"2026-11-08T01:38:30.008Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-123602","references":[{"url":"https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-2hxp-x833-73f7","label":"GitHub Security Advisory (GHSA-2hxp-x833-73f7)"},{"url":"https://www.vulncheck.com/advisories/hickory-dns-recursor-ghost-domain-attack-via-child-side-ns-rrset-caching","label":"VulnCheck Advisory: Hickory DNS Recursor Ghost Domain Attack via Child-Side NS RRset Caching"}],"tags":["cve.org"],"ingestedAt":"2026-11-08T02:43:18.642Z","slug":"CVE-2026-123602","body":"## Overview\n\nThe 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.\n\n## Affected\n\n- `hickory-dns <= 0.26.0-alpha.1`\n- `hickory-dns >= 0.26.0-beta.1 < 0.26.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":32,"depthScoreParts":{"impact":32.5,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}