{"id":"CVE-2026-123585","title":"Hickory DNS 0.25.0 before 0.26.2 Query Amplification via Irrelevant CNAME Records","summary":"The hickory-resolver component of Hickory DNS 0.25.0 before 0.26.2 follows irrelevant CNAME records when resolving recursive queries, sending queries that are unnecessary to answer the original request. Attackers controlling DNS response…","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","cvssSource":"cna","cwe":["CWE-400"],"vendor":"hickory-dns","product":"hickory-dns","affected":["hickory-dns >= 0.25.0 < 0.26.2"],"published":"2026-11-08","updated":"2026-11-08","sourceUpdated":"2026-11-08T01:38:18.261Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-123585","references":[{"url":"https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-6f2x-v7q7-m7m5","label":"GitHub Security Advisory (GHSA-6f2x-v7q7-m7m5)"},{"url":"https://www.vulncheck.com/advisories/hickory-dns-0.25.0-before-0.26.2-query-amplification-via-irrelevant-cname-records","label":"VulnCheck Advisory: Hickory DNS 0.25.0 before 0.26.2 Query Amplification via Irrelevant CNAME Records"}],"tags":["cve.org"],"ingestedAt":"2026-11-08T02:43:18.654Z","slug":"CVE-2026-123585","body":"## Overview\n\nThe hickory-resolver component of Hickory DNS 0.25.0 before 0.26.2 follows irrelevant CNAME records when resolving recursive queries, sending queries that are unnecessary to answer the original request. Attackers controlling DNS responses can include CNAME records in the authority or additional sections, or outside the original query name's CNAME chain, causing excess resolver queries and increased query amplification.\n\n## Affected\n\n- `hickory-dns >= 0.25.0 < 0.26.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}