fast-xml-parser XMLBuilder: XML Comment and CDATA Injection via Unescaped Delimiters_CVE-2026-41650

{
    "lastseen": "",
    "description": "fast-xml-parser allows users to process XML from JS object without C/C++ based libraries or callbacks. Prior to version 5.7.0, XMLBuilder does not escape the \"-->\" sequence in comment content or the \"]]>\" sequence in CDATA sections when building XML from JavaScript objects. This allows XML injection when user-controlled data flows into comments or CDATA elements, leading to XSS, SOAP injection, or data manipulation. This issue has been patched in version 5.7.0.",
    "published": "2026-05-07T13:36:55.871Z",
    "modified": "2026-05-07T15:08:36.208Z",
    "type": "cve",
    "title": "fast-xml-parser XMLBuilder: XML Comment and CDATA Injection via Unescaped Delimiters",
    "source": "GitHub_M",
    "references": "https://github.com/NaturalIntelligence/fast-xml-parser/security/advisories/GHSA-gh4j-gqv2-49f6\nhttps://github.com/NaturalIntelligence/fast-xml-parser/releases/tag/v5.6.0",
    "id": "CVE-2026-41650",
    "bulletinFamily": "",
    "cwe": [
        "CWE-91"
    ],
    "cvelist": null,
    "sourceData": "NaturalIntelligence fast-xml-parser < 5.7.0",
    "sourceHref": "",
    "cvss": {
        "score": 6.1,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "fast-xml-parser",
    "version": "< 5.7.0",
    "vendor": "NaturalIntelligence",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}