CVE-2026-59171

{
  "id": "CVE-2026-59171",
  "sourceIdentifier": "[email protected]",
  "published": "2026-11-06T21:17:09.390",
  "lastModified": "2026-11-06T21:17:09.390",
  "vulnStatus": "Received",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "JSON-java is a reference implementation of a JSON package in Java. From version 20150729 through 20260522, JSONTokener.nextSimpleValue can accumulate unbounded numeric tokens before JSONObject.stringToNumber passes them to BigInteger or BigDecimal conversion without a length limit. An application that parses attacker-controlled JSON or XML through JSONObject, JSONArray, or XML.toJSONObject can spend super-linear CPU time converting a sufficiently long numeric literal, blocking request-handling threads and causing denial of service. Strict mode and keep-strings settings in JSONParserConfiguration do not prevent the affected conversion path. Version 20260719 limits numeric conversion length."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "stleary",
          "product": "JSON-java",
          "versions": [
            {
              "version": ">= 20150729, < 20260719",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "baseScore": 5.9,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 3.6
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Primary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        },
        {
          "lang": "en",
          "value": "CWE-770"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/stleary/JSON-java/commit/703ac34a55400f9c50889e3d0c778b6d7962e81c",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/stleary/JSON-java/commit/ab92bb9088a37f9e346cd1dda66f6a3c40a201e0",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/stleary/JSON-java/commit/fce83c91bb229dde472283dea648a9a8955237fd",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/stleary/JSON-java/pull/1065",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/stleary/JSON-java/pull/1067",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/stleary/JSON-java/releases/tag/20260719",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/stleary/JSON-java/security/advisories/GHSA-ghc9-756g-vrcv",
      "source": "[email protected]"
    }
  ]
}