{"affected":[{"defaultStatus":"unaffected","ecosystem":"cargo","packageName":"hickory-proto","product":"hickory-dns","source":"CNA: VulnCheck","vendor":"hickory-dns","versions":[{"lessThanOrEqual":"0.25.2","status":"affected","version":"0.25.0-alpha.3","versionType":"semver"}]},{"defaultStatus":"unaffected","ecosystem":"cargo","packageName":"hickory-net","product":"hickory-dns","source":"CNA: VulnCheck","vendor":"hickory-dns","versions":[{"lessThan":"0.26.2","status":"affected","version":"0.26.0-alpha.1","versionType":"semver"},{"status":"unaffected","version":"0.26.2","versionType":"semver"}]}],"cveId":"CVE-2026-123600","cwes":["CWE-358"],"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.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":6.3,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N","version":"4.0"},{"score":4.8,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L","version":"3.1"}],"modifiedAt":1794101908487,"publishedAt":1794101908487,"references":[{"source":"CNA: VulnCheck","tags":["vendor-advisory"],"url":"https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-3jvh-8vj5-65rq"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/hickory-dns-hickory-proto-0.25.0-alpha.3-through-0.25.2-nsec3-apex-nodata-validation-bypass"}],"remediation":[],"revision":"78ad64351fcd15487c8f9a847b4eb3eaaf039e13172fc704450149b080902463","sources":[{"modifiedAt":1794101908487,"name":"CNA: VulnCheck","retrievedAt":1794103837744,"url":"https://www.cve.org/CVERecord?id=CVE-2026-123600"}],"ssvc":null,"status":"published","title":"Hickory DNS hickory-proto 0.25.0-alpha.3 through 0.25.2 NSEC3 Apex NODATA Validation Bypass","updatedAt":1794103837744}