{"id":"CVE-2026-123605","aliases":["RUSTSEC-2026-0507","GHSA-2vgh-3wfw-qj7c"],"title":"Hickory DNS through 0.25.0-alpha.3 DNSSEC Validation Bypass via RRSIG Signer's Name","titleSource":"VulnCheck","descriptionSource":"OSV","description":"DNSSEC validation checked an RRset against the DNSKEYs of whatever zone was named in the RRSIG's Signer's Name field. RFC 4035 section 5.3.1 requires that name to be the zone that contains the RRset, but this was not checked.\n\nAnyone who controls a DNSSEC-signed zone, and can answer or modify DNS responses, can therefore sign records for names in an unrelated zone with their own keys and have the validator accept them as secure.\n\nThis affects DNSSEC validation through `DnssecDnsHandle` (resolver, recursor and client) when built with `dnssec-ring` or `dnssec-aws-lc-rs`.\n\nThe fix ignores an RRSIG whose signer name is not the RRset's owner name or one of its ancestors. It is in 0.26.2.","severity":"high","score":8.8,"published":"2026-09-03T12:00:00.000Z","modified":"2026-11-12T14:00:04.072Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"crates.io","name":"hickory-net","sources":[{"name":"OSV · RUSTSEC-2026-0507","url":"https://osv.dev/vulnerability/RUSTSEC-2026-0507"}],"ranges":[{"events":[{"introduced":"0.0.0-0"},{"fixed":"0.26.2"}],"type":"SEMVER"}],"versions":[],"fixed":["0.26.2"]}],"sourceAffected":[],"references":["https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-2vgh-3wfw-qj7c","https://www.vulncheck.com/advisories/hickory-dns-through-0.25.0-alpha.3-dnssec-validation-bypass-via-rrsig-signer-s-name","https://crates.io/crates/hickory-net","https://rustsec.org/advisories/RUSTSEC-2026-0507.html","https://github.com/hickory-dns/hickory-dns/commit/019535e011131c52d19cb6a2c7a2d31270271135"],"sources":[{"name":"CVE","id":"CVE-2026-123605","modified":"2026-11-10T17:56:59.926Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-123605"},{"name":"OSV","id":"RUSTSEC-2026-0507","modified":"2026-11-12T14:00:04.072693821Z","url":"https://osv.dev/vulnerability/RUSTSEC-2026-0507"}],"assessments":[{"source":"VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","score":8.7},{"source":"VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":8.8}],"cve":{"records":[{"id":"CVE-2026-123605","source":"VulnCheck","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-11-06T01:02:39.794Z","published":"2026-11-08T01:38:32.045Z","modified":"2026-11-10T17:56:59.926Z"}],"publishers":[{"name":"VulnCheck","role":"CNA","organizationId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","modified":"2026-11-08T01:38:32.045Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-11-10T17:56:59.926Z"}],"references":[{"url":"https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-2vgh-3wfw-qj7c","tags":["vendor-advisory"],"source":"VulnCheck"},{"url":"https://www.vulncheck.com/advisories/hickory-dns-through-0.25.0-alpha.3-dnssec-validation-bypass-via-rrsig-signer-s-name","tags":["third-party-advisory"],"source":"VulnCheck"}],"weaknesses":[{"id":"CWE-347","description":"Improper Verification of Cryptographic Signature","source":"VulnCheck"}],"applicability":[],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-11-10T16:26:03.880667Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"no"},{"name":"Technical Impact","value":"total"}]}]},"products":[{"vendor":"hickory-dns","name":"hickory-dns","platforms":[],"versions":[{"version":"0.1","status":"affected","lessThanOrEqual":"0.25.0-alpha.3","versionType":"custom"}],"defaultStatus":"unaffected","packageURL":"pkg:cargo/hickory-proto","packageIdentity":{"ecosystem":"crates.io","name":"hickory-proto"},"cpes":[],"source":"VulnCheck","url":"https://www.cve.org/CVERecord?id=CVE-2026-123605"},{"vendor":"hickory-dns","name":"hickory-dns","platforms":[],"versions":[{"version":"0.26.0-beta.1","status":"affected","lessThan":"0.26.2","versionType":"semver"},{"version":"0.26.2","status":"unaffected","versionType":"semver"}],"defaultStatus":"unaffected","packageURL":"pkg:cargo/hickory-net","packageIdentity":{"ecosystem":"crates.io","name":"hickory-net"},"cpes":[],"source":"VulnCheck","url":"https://www.cve.org/CVERecord?id=CVE-2026-123605"}],"remediation":[],"observedAt":"2026-11-12T21:53:12.822Z","kev":{"status":"not-listed","checkedAt":"2026-11-15T02:20:31.829Z"},"coverage":[{"source":"NVD","status":"no-result","checkedAt":"2026-11-08T02:05:35.911Z","attemptedAt":"2026-11-08T02:05:35.911Z"},{"source":"GHSA","status":"no-result","checkedAt":"2026-11-08T02:05:35.851Z","attemptedAt":"2026-11-08T02:05:35.851Z"},{"source":"EUVD","status":"refresh-failed","attemptedAt":"2026-11-08T02:05:35.911Z"},{"source":"EPSS","status":"no-result","checkedAt":"2026-11-08T02:05:35.853Z","attemptedAt":"2026-11-08T02:05:35.853Z"}],"evidence":[],"aiSummary":{"text":"Hickory DNS through 0.25.0-alpha.3 has a DNSSEC validation bypass via the RRSIG signer's name. An attacker with control over a DNSSEC-signed zone can sign records for unrelated zones. This affects DNSSEC validation in versions less than 0.26.2.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-11-13T04:16:03.154Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-123605"},{"name":"OSV","url":"https://osv.dev/vulnerability/RUSTSEC-2026-0507"}]}}