{"id":"CVE-2026-123581","aliases":["RUSTSEC-2026-0512","GHSA-929p-gjf6-5hqj","RUSTSEC-2026-0520"],"title":"Hickory DNS through 0.26.0-alpha.1 DNSSEC Validation Bypass via Unrelated RRset","titleSource":"VulnCheck","descriptionSource":"OSV","description":"Up to 0.26.0-alpha.1, hickory-proto's DNSSEC validation treated a response with a non-empty answer section as a positive answer if its records validated, without checking that any of them matched the queried name and type. Someone who can answer or modify DNS responses could return a genuine signed RRset for another name or type and have it accepted as a validated answer.\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":"medium","score":6.9,"published":"2026-09-03T12:00:00.000Z","modified":"2026-11-12T14:40:54.645Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"crates.io","name":"hickory-proto","sources":[{"name":"OSV · RUSTSEC-2026-0512","url":"https://osv.dev/vulnerability/RUSTSEC-2026-0512"}],"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-2026-0520","url":"https://osv.dev/vulnerability/RUSTSEC-2026-0520"}],"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-929p-gjf6-5hqj","https://www.vulncheck.com/advisories/hickory-dns-through-0.26.0-alpha.1-dnssec-validation-bypass-via-unrelated-rrset","https://crates.io/crates/hickory-proto","https://rustsec.org/advisories/RUSTSEC-2026-0512.html","https://github.com/hickory-dns/hickory-dns/commit/77ec9c5d2e9481a0753bbaf1be3cd5175d300cff","https://crates.io/crates/hickory-net","https://rustsec.org/advisories/RUSTSEC-2026-0520.html"],"sources":[{"name":"CVE","id":"CVE-2026-123581","modified":"2026-11-10T17:57:50.919Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-123581"},{"name":"OSV","id":"RUSTSEC-2026-0512","modified":"2026-11-12T14:40:54.645975781Z","url":"https://osv.dev/vulnerability/RUSTSEC-2026-0512"},{"name":"OSV","id":"RUSTSEC-2026-0520","modified":"2026-11-12T14:40:54.645975781Z","url":"https://osv.dev/vulnerability/RUSTSEC-2026-0520"}],"assessments":[{"source":"VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N","score":6.9},{"source":"VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","score":5.3},{"source":"OSV","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","score":5.3},{"source":"OSV","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","score":5.3}],"cve":{"records":[{"id":"CVE-2026-123581","source":"VulnCheck","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-11-06T00:55:55.661Z","published":"2026-11-08T01:38:15.448Z","modified":"2026-11-10T17:57:50.919Z"}],"publishers":[{"name":"VulnCheck","role":"CNA","organizationId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","modified":"2026-11-08T01:38:15.448Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-11-10T17:57:50.919Z"}],"references":[{"url":"https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-929p-gjf6-5hqj","tags":["vendor-advisory"],"source":"VulnCheck"},{"url":"https://www.vulncheck.com/advisories/hickory-dns-through-0.26.0-alpha.1-dnssec-validation-bypass-via-unrelated-rrset","tags":["third-party-advisory"],"source":"VulnCheck"}],"weaknesses":[{"id":"CWE-345","description":"Insufficient Verification of Data Authenticity","source":"VulnCheck"}],"applicability":[],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-11-10T16:29:28.830820Z","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","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-2026-123581"},{"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-2026-123581"}],"remediation":[],"observedAt":"2026-11-12T21:52:40.320Z","kev":{"status":"not-listed","checkedAt":"2026-11-15T01:50:31.401Z"},"coverage":[{"source":"NVD","status":"available","checkedAt":"2026-11-08T02:35:31.549Z","attemptedAt":"2026-11-08T02:35:31.549Z"},{"source":"GHSA","status":"no-result","checkedAt":"2026-11-08T02:35:32.462Z","attemptedAt":"2026-11-08T02:35:32.462Z"},{"source":"EUVD","status":"no-result","checkedAt":"2026-11-08T02:35:31.549Z","attemptedAt":"2026-11-08T02:35:31.549Z"},{"source":"EPSS","status":"no-result","checkedAt":"2026-11-08T02:35:32.456Z","attemptedAt":"2026-11-08T02:35:32.456Z"}],"evidence":[{"source":"NVD","id":"CVE-2026-123581","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123581","modified":"2026-11-08T02:16:51.693","score":6.9,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/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":"2026-11-08T02:35:31.549Z"},{"source":"NVD","id":"CVE-2026-123581","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-123581","modified":"2026-11-08T02:16:51.693","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","checkedAt":"2026-11-08T02:35:31.549Z"}],"aiSummary":{"text":"Hickory DNS through 0.26.0-alpha.1 has a DNSSEC validation bypass via unrelated RRset. An attacker who can answer or modify DNS responses could return a genuine signed RRset for another name or type and have it accepted as a validated answer. This affects hickory-proto versions up to 0.26.0-alpha.1.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-11-13T04:01:08.296Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-123581"},{"name":"OSV","url":"https://osv.dev/vulnerability/RUSTSEC-2026-0512"},{"name":"OSV","url":"https://osv.dev/vulnerability/RUSTSEC-2026-0520"}]}}