Vulnerability-Lookup

GHSA-884W-H442-Q7PH

Vulnerability from github – Published: 2026-09-18 15:32 – Updated: 2026-09-18 15:32

Details

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.

Severity

7.5 (High)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

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

Show details on source website

JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2026-93657"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-347"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-09-18T15:17:22Z",
    "severity": "HIGH"
  },
  "details": "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.",
  "id": "GHSA-884w-h442-q7ph",
  "modified": "2026-09-18T15:32:20Z",
  "published": "2026-09-18T15:32:20Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/hickory-dns/hickory-dns/security/advisories/GHSA-5j98-2g5x-46v6"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93657"
    },
    {
      "type": "WEB",
      "url": "https://github.com/hickory-dns/hickory-dns/pull/3871"
    },
    {
      "type": "WEB",
      "url": "https://github.com/hickory-dns/hickory-dns/commit/30720f4fb22e5556ecbf26d2c8274ea4a9fdd238"
    },
    {
      "type": "WEB",
      "url": "https://github.com/hickory-dns/hickory-dns"
    },
    {
      "type": "WEB",
      "url": "https://github.com/hickory-dns/hickory-dns/releases/tag/v0.26.2"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/hickory-resolver-before-0.26.2-dnssec-validation-bypass"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
      "type": "CVSS_V3"
    },
    {
      "score": "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",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-93657 (GCVE-0-2026-93657)

Vulnerability from cvelistv5 – Published: 2026-09-18 14:23 – Updated: 2026-09-18 14:23

Title

hickory-resolver before 0.26.2 DNSSEC Validation Bypass

Summary

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

Assigner

VulnCheck mitre root

References

6 references

URL	Tags
https://github.com/hickory-dns/hickory-dns/securi…	vendor-advisory
https://github.com/hickory-dns/hickory-dns/commit…	patch
https://github.com/hickory-dns/hickory-dns/pull/3871	patchissue-tracking
https://github.com/hickory-dns/hickory-dns/releas…	release-notes
https://github.com/hickory-dns/hickory-dns	product
https://www.vulncheck.com/advisories/hickory-reso…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
hickory-dns	hickory-resolver	Affected: 0 , < 0.26.2 (semver) Unaffected: 0.26.2 (semver)

Date Public

2026-09-03 21:04

Credits

Ali Firas (thesmartshadow)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "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": "2026-09-18T14:23:20.181Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.