{"id":"CVE-2026-123600","published":"2026-11-08T02:16:54.640","lastModified":"2026-11-10T22:15:59.797","description":"Hickory DNS hickory-proto 0.25.0-alpha.3 through 0.25.2 and hickory-net 0.26.0-alpha.1 before 0.26.2 contain a DNSSEC validation flaw in DnssecDnsHandle that accepts NSEC3-signed NODATA responses for zone-apex queries as secure without an NSEC3 record matching the hashed QNAME. On-path attackers or malicious authoritative servers can replay a validly signed non-apex NSEC3 with the zone's signed SOA to serve an authenticated (AD=1) denial of any apex RRtype for the negative-cache TTL.","cvssScore":4.8,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L","cwes":["CWE-358"],"vendors":[],"products":[],"references":[{"url":"https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-3jvh-8vj5-65rq","tags":[]},{"url":"https://www.vulncheck.com/advisories/hickory-dns-hickory-proto-0.25.0-alpha.3-through-0.25.2-nsec3-apex-nodata-validation-bypass","tags":[]}],"exploitRefs":[{"url":"https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-3jvh-8vj5-65rq","tags":[]}],"hasPoc":true,"ai":null}