CVE-2026-46419

{
  "id": "CVE-2026-46419",
  "sourceIdentifier": "[email protected]",
  "published": "2026-05-14T02:17:21.917",
  "lastModified": "2026-10-26T14:10:00.130",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Yubico webauthn-server-core (aka java-webauthn-server) 2.8.0 before 2.8.2 incorrectly checks a function's return value in the second factor flow, leading to impersonation."
    },
    {
      "lang": "es",
      "value": "Yubico webauthn-server-core (también conocido como java-webauthn-server) 2.8.0 anterior a 2.8.2 comprueba incorrectamente el valor de retorno de una función en el flujo del segundo factor, lo que lleva a la suplantación de identidad."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "Yubico",
          "product": "webauthn-server-core",
          "defaultStatus": "unaffected",
          "versions": [
            {
              "version": "2.8.0",
              "lessThan": "2.8.2",
              "versionType": "semver",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "HIGH",
          "integrityImpact": "HIGH",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 1.6,
        "impactScore": 5.9
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-05-14T13:52:44.564338Z",
          "id": "CVE-2026-46419",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-253"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/Yubico/java-webauthn-server/releases/tag/2.8.2",
      "source": "[email protected]"
    },
    {
      "url": "https://www.yubico.com/support/security-advisories/ysa-2026-02/",
      "source": "[email protected]"
    }
  ]
}