http4k before 6.48.0.0 Digest Authentication Replay Protection Bypass

{
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "cveMetadata": {
    "cveId": "CVE-2026-100834",
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "dateUpdated": "2026-09-27T01:28:32.781Z",
    "dateReserved": "2026-09-26T23:23:03.410Z",
    "datePublished": "2026-09-27T01:28:32.781Z",
    "state": "PUBLISHED"
  },
  "containers": {
    "cna": {
      "providerMetadata": {
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck",
        "dateUpdated": "2026-09-27T01:28:32.781Z"
      },
      "datePublic": "2026-06-16T00:00:00.000Z",
      "title": "http4k before 6.48.0.0 Digest Authentication Replay Protection Bypass",
      "descriptions": [
        {
          "lang": "en",
          "value": "http4k's Digest authentication module (org.http4k:http4k-security-digest) before versions 6.48.0.0, 5.42.0.0 and 4.51.0.0 defaults the nonceVerifier parameter of ServerFilters.DigestAuth and DigestAuthProvider to { true }, so every nonce is accepted regardless of its value, age, or prior use. Applications relying on this default have no replay protection on Digest authentication: an attacker who can capture a valid 'Authorization: Digest' response (for example by observing network traffic or reading logs) can replay it indefinitely against the same protected resource."
        }
      ],
      "affected": [
        {
          "vendor": "http4k",
          "product": "http4k",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "6.48.0.0"
            },
            {
              "version": "6.48.0.0",
              "status": "unaffected",
              "versionType": "custom"
            }
          ]
        },
        {
          "vendor": "http4k",
          "product": "http4k",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "5.42.0.0"
            },
            {
              "version": "5.42.0.0",
              "status": "unaffected",
              "versionType": "custom"
            }
          ]
        },
        {
          "vendor": "http4k",
          "product": "http4k",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "0",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "4.51.0.0"
            },
            {
              "version": "4.51.0.0",
              "status": "unaffected",
              "versionType": "custom"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "lang": "en",
              "description": "Authentication Bypass by Capture-replay",
              "cweId": "CWE-294",
              "type": "CWE"
            }
          ]
        }
      ],
      "references": [
        {
          "url": "https://github.com/http4k/http4k/security/advisories/GHSA-c7jm-38gq-h67h",
          "name": "GitHub Security Advisory (GHSA-c7jm-38gq-h67h)",
          "tags": [
            "vendor-advisory"
          ]
        },
        {
          "url": "https://github.com/http4k/http4k/commit/8a52b615b1",
          "name": "Patch Commit",
          "tags": [
            "patch"
          ]
        },
        {
          "url": "https://github.com/http4k/http4k/commit/4f904b4692",
          "name": "Patch Commit",
          "tags": [
            "patch"
          ]
        },
        {
          "url": "https://www.vulncheck.com/advisories/http4k-before-6.48.0.0-digest-authentication-replay-protection-bypass",
          "name": "VulnCheck Advisory: http4k before 6.48.0.0 Digest Authentication Replay Protection Bypass",
          "tags": [
            "third-party-advisory"
          ]
        }
      ],
      "metrics": [
        {
          "format": "CVSS"
        },
        {
          "format": "CVSS",
          "cvssV3_1": {
            "version": "3.1",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N",
            "attackVector": "NETWORK",
            "attackComplexity": "HIGH",
            "privilegesRequired": "NONE",
            "userInteraction": "NONE",
            "scope": "UNCHANGED",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "availabilityImpact": "NONE",
            "baseScore": 5.9,
            "baseSeverity": "MEDIUM"
          }
        }
      ]
    }
  }
}