{"id":"CVE-2026-123580","aliases":["RUSTSEC-2026-0505","GHSA-p2jv-r3m3-7wf4","RUSTSEC-2026-0509"],"title":"Hickory-DNS 0.26.0-beta.1 before 0.26.2 DNSSEC Nonexistence Proof Forgery via NSEC3","titleSource":"VulnCheck","descriptionSource":"OSV","description":"Up to 0.26.0-alpha.1, hickory-proto's DNSSEC validation matched NSEC3 records to a name only by the hashed first label of the NSEC3 owner name, without checking that the rest of the owner name was the zone in question. A signed NSEC3 record from any zone the attacker controls could therefore be used, by someone who can answer or modify DNS responses, to prove that a name in another zone does not exist.\n\nFrom 0.26.0-beta.1 the DNSSEC validation code lives in the hickory-net crate, where this was fixed in hickory-net 0.26.2. No hickory-proto release contains a fix. Users of DNSSEC validation in older hickory-proto releases (directly or through hickory-resolver or hickory-recursor) should move to the 0.26.2 or later releases, which validate through hickory-net.","severity":"high","score":8.7,"published":"2026-09-03T12:00:00.000Z","modified":"2026-11-12T14:10:38.251Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"crates.io","name":"hickory-proto","sources":[{"name":"OSV · RUSTSEC-2026-0505","url":"https://osv.dev/vulnerability/RUSTSEC-2026-0505"}],"ranges":[{"events":[{"introduced":"0.0.0-0"},{"fixed":"0.26.0-beta.1"}],"type":"SEMVER"}],"versions":[],"fixed":["0.26.0-beta.1"]},{"ecosystem":"crates.io","name":"hickory-net","sources":[{"name":"OSV · RUSTSEC-2026-0509","url":"https://osv.dev/vulnerability/RUSTSEC-2026-0509"}],"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-p2jv-r3m3-7wf4","https://www.vulncheck.com/advisories/hickory-dns-0.26.0-beta.1-before-0.26.2-dnssec-nonexistence-proof-forgery-via-nsec3","https://crates.io/crates/hickory-proto","https://rustsec.org/advisories/RUSTSEC-2026-0505.html","https://github.com/hickory-dns/hickory-dns/commit/10840b8432feb08d369f82e2bb6ce99ae23d7afa","https://crates.io/crates/hickory-net","https://rustsec.org/advisories/RUSTSEC-2026-0509.html","https://github.com/hickory-dns/hickory-dns/commit/d2ee774a789193010f109d3d463adf72c4c261ab"],"sources":[{"name":"CVE","id":"CVE-2026-123580","modified":"2026-11-12T13:08:17.209Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-123580"},{"name":"OSV","id":"RUSTSEC-2026-0505","modified":"2026-11-12T14:10:38.251619656Z","url":"https://osv.dev/vulnerability/RUSTSEC-2026-0505"},{"name":"OSV","id":"RUSTSEC-2026-0509","modified":"2026-11-12T14:10:38.251619656Z","url":"https://osv.dev/vulnerability/RUSTSEC-2026-0509"}],"assessments":[{"source":"VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N","score":8.7},{"source":"VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","score":7.5},{"source":"OSV","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","score":7.5},{"source":"OSV","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","score":7.5}],"cve":{"records":[{"id":"CVE-2026-123580","source":"VulnCheck","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-11-06T00:55:55.661Z","published":"2026-11-08T01:38:14.779Z","modified":"2026-11-12T13:08:17.209Z"}],"publishers":[{"name":"VulnCheck","role":"CNA","organizationId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","modified":"2026-11-08T01:38:14.779Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-11-12T13:08:17.209Z"}],"references":[{"url":"https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-p2jv-r3m3-7wf4","tags":["vendor-advisory"],"source":"VulnCheck"},{"url":"https://www.vulncheck.com/advisories/hickory-dns-0.26.0-beta.1-before-0.26.2-dnssec-nonexistence-proof-forgery-via-nsec3","tags":["third-party-advisory"],"source":"VulnCheck"}],"weaknesses":[{"id":"CWE-290","description":"Authentication Bypass by Spoofing","source":"VulnCheck"}],"applicability":[],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-11-12T13:07:24.535038Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"yes"},{"name":"Technical Impact","value":"partial"}]}]},"products":[{"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-2026-123580"},{"vendor":"hickory-dns","name":"hickory-dns","platforms":[],"versions":[{"version":"0","status":"affected","lessThanOrEqual":"0.26.0-alpha.1","versionType":"semver"}],"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-2026-123580"}],"remediation":[],"observedAt":"2026-11-12T21:53:11.131Z","kev":{"status":"not-listed","checkedAt":"2026-11-15T01:20:32.796Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-11-08T02:35:33.613Z","attemptedAt":"2026-11-08T02:35:33.613Z"},{"source":"GHSA","status":"no-result","checkedAt":"2026-11-08T02:35:33.838Z","attemptedAt":"2026-11-08T02:35:33.838Z"},{"source":"EUVD","status":"no-result","checkedAt":"2026-11-08T02:35:34.024Z","attemptedAt":"2026-11-08T02:35:34.024Z"},{"source":"EPSS","status":"no-result","checkedAt":"2026-11-08T02:35:34.155Z","attemptedAt":"2026-11-08T02:35:34.155Z"}],"evidence":[{"source":"NVD","id":"CVE-2026-123580","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123580","modified":"2026-11-08T02:16:51.540","score":8.7,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","checkedAt":"2026-11-08T02:35:33.613Z"},{"source":"NVD","id":"CVE-2026-123580","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123580","modified":"2026-11-08T02:16:51.540","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","checkedAt":"2026-11-08T02:35:33.613Z"}],"aiSummary":{"text":"Hickory-DNS versions before 0.26.2 are vulnerable to DNSSEC Nonexistence Proof Forgery via NSEC3. An attacker who can answer or modify DNS responses may use a signed NSEC3 record from any zone to prove nonexistence of a name in another zone. Affected versions include 0.26.0-beta.1 and earlier.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-11-13T04:11:09.090Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-123580"},{"name":"OSV","url":"https://osv.dev/vulnerability/RUSTSEC-2026-0505"},{"name":"OSV","url":"https://osv.dev/vulnerability/RUSTSEC-2026-0509"}]}}