{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "1.2.7"
              }
            ],
            "source": "AFFECTED_FIELD"
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "032a2eaca1a989e56d88218f2a3cb91a68afebe8"
            }
          ],
          "repo": "https://github.com/cesanta/mjson",
          "type": "GIT"
        }
      ],
      "versions": [
        "1.2.7"
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "mitre",
    "cwe_ids": [
      "CWE-407"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/30xxx/CVE-2023-30421.json"
  },
  "details": "mystrtod in mjson 1.2.7 requires more than a billion iterations during processing of certain digit strings such as 8891110122900e913013935755114.",
  "id": "CVE-2023-30421",
  "modified": "2026-08-12T03:51:48.058912296Z",
  "published": "2025-04-19T00:00:00Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/boofish/json_bugs/blob/main/mjson"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2023/30xxx/CVE-2023-30421.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2023-30421"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/cesanta/mjson/releases"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L",
      "type": "CVSS_V3"
    }
  ]
}