{"id":"CVE-2026-123606","title":"Hickory-DNS Recursor 0.25.0-alpha.3 through 0.25.2 Glueless-NS Referral Amplification","summary":"The hickory-dns recursor in hickory-recursor 0.25.0-alpha.3 through 0.25.2 and hickory-resolver 0.26.0-alpha.1 before 0.26.2 iterates every out-of-bailiwick NS target lacking glue in a referral without any per-query work budget. Remote a…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"cna","cwe":["CWE-400"],"vendor":"hickory-dns","product":"hickory-dns","affected":["hickory-dns >= 0.25.0-alpha.3 <= 0.25.2","hickory-dns >= 0.26.0-alpha.1 < 0.26.2"],"published":"2026-11-08","updated":"2026-11-08","sourceUpdated":"2026-11-08T01:38:32.727Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-123606","references":[{"url":"https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-6h5c-jjg5-wj59","label":"GitHub Security Advisory (GHSA-6h5c-jjg5-wj59)"},{"url":"https://www.vulncheck.com/advisories/hickory-dns-recursor-0.25.0-alpha.3-through-0.25.2-glueless-ns-referral-amplification","label":"VulnCheck Advisory: Hickory-DNS Recursor 0.25.0-alpha.3 through 0.25.2 Glueless-NS Referral Amplification"}],"tags":["cve.org"],"ingestedAt":"2026-11-08T02:43:18.641Z","slug":"CVE-2026-123606","body":"## Overview\n\nThe hickory-dns recursor in hickory-recursor 0.25.0-alpha.3 through 0.25.2 and hickory-resolver 0.26.0-alpha.1 before 0.26.2 iterates every out-of-bailiwick NS target lacking glue in a referral without any per-query work budget. Remote attackers can serve such referrals to force A and AAAA lookups per target, amplifying traffic against remote servers or exhausting recursor resources.\n\n## Affected\n\n- `hickory-dns >= 0.25.0-alpha.3 <= 0.25.2`\n- `hickory-dns >= 0.26.0-alpha.1 < 0.26.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}