{"id":"CVE-2026-123587","title":"Hickory-DNS 0.26.0 before 0.26.2 DNSSEC Nonexistence Forgery via Wraparound NSEC","summary":"The DNSSEC validation in the Hickory DNS hickory-net crate 0.26.0 before 0.26.2 identifies wraparound NSEC records by comparing the next domain name to an SOA record in the response, accepting that SOA even if it fails validation. Attack…","severity":"medium","cvss":6.8,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N","cvssSource":"cna","cwe":["CWE-290"],"vendor":"hickory-dns","product":"hickory-dns","affected":["hickory-dns >= 0.26.0 < 0.26.2"],"published":"2026-11-08","updated":"2026-11-08","sourceUpdated":"2026-11-08T01:38:19.630Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-123587","references":[{"url":"https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-qw83-5pm2-ggp5","label":"GitHub Security Advisory (GHSA-qw83-5pm2-ggp5)"},{"url":"https://www.vulncheck.com/advisories/hickory-dns-0.26.0-before-0.26.2-dnssec-nonexistence-forgery-via-wraparound-nsec","label":"VulnCheck Advisory: Hickory-DNS 0.26.0 before 0.26.2 DNSSEC Nonexistence Forgery via Wraparound NSEC"}],"tags":["cve.org"],"ingestedAt":"2026-11-08T02:43:18.649Z","slug":"CVE-2026-123587","body":"## Overview\n\nThe DNSSEC validation in the Hickory DNS hickory-net crate 0.26.0 before 0.26.2 identifies wraparound NSEC records by comparing the next domain name to an SOA record in the response, accepting that SOA even if it fails validation. Attackers who can supply DNS responses can combine a genuine NSEC record and its RRSIG with a crafted SOA record to forge nonexistence of any RRset.\n\n## Affected\n\n- `hickory-dns >= 0.26.0 < 0.26.2`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":37,"depthScoreParts":{"impact":37.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}