{"id":"CVE-2026-93657","state":"PUBLISHED","title":"hickory-resolver before 0.26.2 DNSSEC Validation Bypass","description":"hickory-resolver versions before 0.26.2 fail to propagate bogus DNSSEC proof states through the Resolver::lookup() and Resolver::lookup_ip() APIs, allowing invalid records to be returned as successful results. Attackers controlling the answering zone or positioned on the network path can have forged DNS records accepted as validated, bypassing DNSSEC authentication checks.","publishedAt":"2026-09-18T14:23:20.181Z","updatedAt":"2026-09-21T20:51:40.507Z","severity":{"score":8.7,"label":"High","version":"4.0","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","source":"VulnCheck"},"assigner":"VulnCheck","products":["hickory-dns hickory-resolver"],"affected":[{"vendor":"hickory-dns","product":"hickory-resolver","packageName":"hickory-resolver","packageURL":"pkg:cargo/hickory-resolver","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"0.26.2","versionType":"semver"},{"version":"0.26.2","status":"unaffected","versionType":"semver"}],"collectionURL":"https://crates.io","repo":"https://github.com/hickory-dns/hickory-dns"}],"references":["https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-5j98-2g5x-46v6","https://github.com/hickory-dns/hickory-dns/commit/30720f4fb22e5556ecbf26d2c8274ea4a9fdd238","https://github.com/hickory-dns/hickory-dns/pull/3871","https://github.com/hickory-dns/hickory-dns/releases/tag/v0.26.2","https://github.com/hickory-dns/hickory-dns","https://www.vulncheck.com/advisories/hickory-resolver-before-0.26.2-dnssec-validation-bypass"],"weaknesses":["CWE-347"],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/93xxx/CVE-2026-93657.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-93657","state":"PUBLISHED","datePublished":"2026-09-18T14:23:20.181Z","dateUpdated":"2026-09-21T20:51:40.507Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-09-18T13:30:25.560Z"},"containers":{"cna":{"title":"hickory-resolver before 0.26.2 DNSSEC Validation Bypass","descriptions":[{"lang":"en","value":"hickory-resolver versions before 0.26.2 fail to propagate bogus DNSSEC proof states through the Resolver::lookup() and Resolver::lookup_ip() APIs, allowing invalid records to be returned as successful results. Attackers controlling the answering zone or positioned on the network path can have forged DNS records accepted as validated, bypassing DNSSEC authentication checks."}],"affected":[{"vendor":"hickory-dns","product":"hickory-resolver","packageName":"hickory-resolver","packageURL":"pkg:cargo/hickory-resolver","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"0.26.2","versionType":"semver"},{"version":"0.26.2","status":"unaffected","versionType":"semver"}],"collectionURL":"https://crates.io","repo":"https://github.com/hickory-dns/hickory-dns"}],"references":[{"url":"https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-5j98-2g5x-46v6","tags":["vendor-advisory"],"name":"GitHub Security Advisory (GHSA-5j98-2g5x-46v6)"},{"url":"https://github.com/hickory-dns/hickory-dns/commit/30720f4fb22e5556ecbf26d2c8274ea4a9fdd238","tags":["patch"],"name":"Return error from Resolver::lookup() if bogus"},{"url":"https://github.com/hickory-dns/hickory-dns/pull/3871","tags":["patch","issue-tracking"],"name":"Pull Request #3871"},{"url":"https://github.com/hickory-dns/hickory-dns/releases/tag/v0.26.2","tags":["release-notes"],"name":"hickory-resolver v0.26.2 Release Notes"},{"url":"https://github.com/hickory-dns/hickory-dns","tags":["product"]},{"url":"https://www.vulncheck.com/advisories/hickory-resolver-before-0.26.2-dnssec-validation-bypass","name":"VulnCheck Advisory: hickory-resolver before 0.26.2 DNSSEC Validation Bypass","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"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","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":8.7,"baseSeverity":"HIGH"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"HIGH","availabilityImpact":"NONE","baseScore":7.5,"baseSeverity":"HIGH"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-347","lang":"en","description":"Improper Verification of Cryptographic Signature","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-09-18T14:23:20.181Z"},"datePublic":"2026-09-03T21:04:44.000Z","credits":[{"lang":"en","value":"Ali Firas (thesmartshadow)","type":"finder"}],"x_generator":{"engine":"vulncheck-endgame"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-21T16:28:49.154433Z","id":"CVE-2026-93657","options":[{"Exploitation":"none"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-21T20:51:40.507Z"}}]}}}