CVE-2026-93657 (GCVE-0-2026-93657)
Vulnerability from cvelistv5
Published
2026-09-18 14:23
Modified
2026-09-21 20:51
Severity ?
8.7 (High) - 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
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
CWE
  • CWE-347 - Improper Verification of Cryptographic Signature
Summary
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.
References
Impacted products
Vendor Product Version
hickory-dns hickory-resolver Version: 0   ≤
Create a notification for this product.
Show details on NVD website

To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-93657",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-21T16:28:49.154433Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-21T20:51:40.507Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "collectionURL": "https://crates.io",
          "defaultStatus": "unaffected",
          "packageName": "hickory-resolver",
          "packageURL": "pkg:cargo/hickory-resolver",
          "product": "hickory-resolver",
          "repo": "https://github.com/hickory-dns/hickory-dns",
          "vendor": "hickory-dns",
          "versions": [
            {
              "lessThan": "0.26.2",
              "status": "affected",
              "version": "0",
              "versionType": "semver"
            },
            {
              "status": "unaffected",
              "version": "0.26.2",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Ali Firas (thesmartshadow)"
        }
      ],
      "datePublic": "2026-09-03T21:04:44.000Z",
      "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."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "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",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "HIGH"
          },
          "format": "CVSS"
        },
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.1"
          },
          "format": "CVSS"
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-347",
              "description": "Improper Verification of Cryptographic Signature",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-18T14:23:20.181Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "GitHub Security Advisory (GHSA-5j98-2g5x-46v6)",
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-5j98-2g5x-46v6"
        },
        {
          "name": "Return error from Resolver::lookup() if bogus",
          "tags": [
            "patch"
          ],
          "url": "https://github.com/hickory-dns/hickory-dns/commit/30720f4fb22e5556ecbf26d2c8274ea4a9fdd238"
        },
        {
          "name": "Pull Request #3871",
          "tags": [
            "patch",
            "issue-tracking"
          ],
          "url": "https://github.com/hickory-dns/hickory-dns/pull/3871"
        },
        {
          "name": "hickory-resolver v0.26.2 Release Notes",
          "tags": [
            "release-notes"
          ],
          "url": "https://github.com/hickory-dns/hickory-dns/releases/tag/v0.26.2"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://github.com/hickory-dns/hickory-dns"
        },
        {
          "name": "VulnCheck Advisory: hickory-resolver before 0.26.2 DNSSEC Validation Bypass",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/hickory-resolver-before-0.26.2-dnssec-validation-bypass"
        }
      ],
      "title": "hickory-resolver before 0.26.2 DNSSEC Validation Bypass",
      "x_generator": {
        "engine": "vulncheck-endgame"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-93657",
    "datePublished": "2026-09-18T14:23:20.181Z",
    "dateReserved": "2026-09-18T13:30:25.560Z",
    "dateUpdated": "2026-09-21T20:51:40.507Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-93657\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"yes\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-09-21T16:28:49.154433Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-09-21T16:28:50.433Z\"}}], \"cna\": {\"title\": \"hickory-resolver before 0.26.2 DNSSEC Validation Bypass\", \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Ali Firas (thesmartshadow)\"}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV4_0\": {\"version\": \"4.0\", \"baseScore\": 8.7, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"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\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"NONE\", \"privilegesRequired\": \"NONE\", \"subIntegrityImpact\": \"NONE\", \"vulnIntegrityImpact\": \"HIGH\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"NONE\", \"subConfidentialityImpact\": \"NONE\", \"vulnConfidentialityImpact\": \"NONE\"}}, {\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 7.5, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"HIGH\", \"vectorString\": \"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N\", \"integrityImpact\": \"HIGH\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"NONE\", \"confidentialityImpact\": \"NONE\"}}], \"affected\": [{\"repo\": \"https://github.com/hickory-dns/hickory-dns\", \"vendor\": \"hickory-dns\", \"product\": \"hickory-resolver\", \"versions\": [{\"status\": \"affected\", \"version\": \"0\", \"lessThan\": \"0.26.2\", \"versionType\": \"semver\"}, {\"status\": \"unaffected\", \"version\": \"0.26.2\", \"versionType\": \"semver\"}], \"packageURL\": \"pkg:cargo/hickory-resolver\", \"packageName\": \"hickory-resolver\", \"collectionURL\": \"https://crates.io\", \"defaultStatus\": \"unaffected\"}], \"datePublic\": \"2026-09-03T21:04:44.000Z\", \"references\": [{\"url\": \"https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-5j98-2g5x-46v6\", \"name\": \"GitHub Security Advisory (GHSA-5j98-2g5x-46v6)\", \"tags\": [\"vendor-advisory\"]}, {\"url\": \"https://github.com/hickory-dns/hickory-dns/commit/30720f4fb22e5556ecbf26d2c8274ea4a9fdd238\", \"name\": \"Return error from Resolver::lookup() if bogus\", \"tags\": [\"patch\"]}, {\"url\": \"https://github.com/hickory-dns/hickory-dns/pull/3871\", \"name\": \"Pull Request #3871\", \"tags\": [\"patch\", \"issue-tracking\"]}, {\"url\": \"https://github.com/hickory-dns/hickory-dns/releases/tag/v0.26.2\", \"name\": \"hickory-resolver v0.26.2 Release Notes\", \"tags\": [\"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\"]}], \"x_generator\": {\"engine\": \"vulncheck-endgame\"}, \"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.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-347\", \"description\": \"Improper Verification of Cryptographic Signature\"}]}], \"providerMetadata\": {\"orgId\": \"83251b91-4cc7-4094-a5c7-464a1b83ea10\", \"shortName\": \"VulnCheck\", \"dateUpdated\": \"2026-09-18T14:23:20.181Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-93657\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-09-21T20:51:40.507Z\", \"dateReserved\": \"2026-09-18T13:30:25.560Z\", \"assignerOrgId\": \"83251b91-4cc7-4094-a5c7-464a1b83ea10\", \"datePublished\": \"2026-09-18T14:23:20.181Z\", \"assignerShortName\": \"VulnCheck\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.