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    "cna": {
      "providerMetadata": {
        "orgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09"
      },
      "title": "JWT Algorithm Confusion allows authentication bypass",
      "problemTypes": [
        {
          "descriptions": [
            {
              "description": "CWE-290 Authentication Bypass by Spoofing",
              "lang": "en",
              "cweId": "CWE-290",
              "type": "CWE"
            }
          ]
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "affected": [
        {
          "vendor": "Apache Software Foundation",
          "product": "Apache APISIX",
          "versions": [
            {
              "status": "affected",
              "version": "2.2",
              "lessThanOrEqual": "3.16.0",
              "versionType": "semver"
            }
          ],
          "defaultStatus": "unaffected"
        }
      ],
      "descriptions": [
        {
          "value": "Authentication Bypass by Spoofing vulnerability in Apache APISIX.\n\nThe attacker can completely bypass authentication capitalising on certain configurations of jwt-auth plugin.\nThis issue affects Apache APISIX: from v2.2 through v3.16.0.\n\nUsers are recommended to upgrade to version v3.17.0, which fixes the issue.",
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              "value": "<p>Authentication Bypass by Spoofing vulnerability in Apache APISIX.</p>The attacker can completely bypass authentication capitalising on certain configurations of jwt-auth plugin.<br><p>This issue affects Apache APISIX: from v2.2 through v3.16.0.</p><p>Users are recommended to upgrade to version v3.17.0, which fixes the issue.</p>"
            }
          ]
        }
      ],
      "references": [
        {
          "url": "https://lists.apache.org/thread/nfopt8cnxd3k0rs1oxtr7lzxrdw4mojq",
          "tags": [
            "vendor-advisory"
          ]
        }
      ],
      "metrics": [
        {
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
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          ],
          "cvssV4_0": {
            "version": "4.0",
            "attackVector": "NETWORK",
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "privilegesRequired": "NONE",
            "userInteraction": "NONE",
            "vulnConfidentialityImpact": "NONE",
            "subConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "NONE",
            "subIntegrityImpact": "HIGH",
            "vulnAvailabilityImpact": "NONE",
            "subAvailabilityImpact": "NONE",
            "Safety": "NOT_DEFINED",
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "valueDensity": "NOT_DEFINED",
            "vulnerabilityResponseEffort": "NOT_DEFINED",
            "providerUrgency": "NOT_DEFINED",
            "baseSeverity": "HIGH",
            "baseScore": 7,
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N"
          }
        }
      ],
      "credits": [
        {
          "lang": "en",
          "value": "Marco Capuano",
          "type": "reporter"
        }
      ],
      "x_generator": {
        "engine": "Vulnogram 0.2.0"
      }
    }
  },
  "cveMetadata": {
    "cveId": "CVE-2026-39999",
    "assignerOrgId": "f0158376-9dc2-43b6-827c-5f631a4d8d09",
    "serial": 1,
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.1"
}