{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "5.9.3"
              },
              {
                "fixed": "5.10.1"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "93a09f108d6f457a84e607a6806a7bfd6abc3e55"
            },
            {
              "fixed": "4e546e03987662de5495d050b5fba26bea65383f"
            },
            {
              "fixed": "2ce7191ef0f96473b8c7e0c384fbc4ad34a222de"
            }
          ],
          "repo": "https://github.com/naturalintelligence/fast-xml-parser",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-8r6m-32jq-jx6q"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-776"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73569.json"
  },
  "details": "fast-xml-parser allows users to process XML from JS object without C/C++ based libraries or callbacks. From 5.9.3 until 5.10.1, src/xmlparser/OrderedObjParser.js processes multiple DOCTYPE declarations within a single XML document and passes each declaration's entities through addInputEntities(). addInputEntities() resets maxTotalExpansions and maxExpandedLength every time it is called, allowing additional DOCTYPE declarations to repeatedly reset the configured entity-expansion limits during one parse operation. A crafted XML document can then cause excessive CPU use, event-loop blocking, memory exhaustion, and process termination. This issue is fixed in version 5.10.1.",
  "id": "CVE-2026-73569",
  "modified": "2026-08-15T11:31:02.332212127Z",
  "published": "2026-08-13T17:45:25.045Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/NaturalIntelligence/fast-xml-parser/releases/tag/v5.10.1"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/73xxx/CVE-2026-73569.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/NaturalIntelligence/fast-xml-parser/security/advisories/GHSA-8r6m-32jq-jx6q"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-73569"
    },
    {
      "type": "FIX",
      "url": "https://github.com/NaturalIntelligence/fast-xml-parser/commit/4e546e03987662de5495d050b5fba26bea65383f"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "fast-xml-parser: Repeated DOCTYPE declarations reset entity expansion limits"
}