CVE-2026-41650— fast-xml-parser XMLBuilder: XML Comment and CDATA Injection via Unescaped Delimiters
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I. Basic Information for CVE-2026-41650
Vulnerability Information
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Vulnerability Title
fast-xml-parser XMLBuilder: XML Comment and CDATA Injection via Unescaped Delimiters
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
XML注入(XPath盲注)
Source: NVD (National Vulnerability Database)
Vulnerability Title
fast-xml-parser 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
fast-xml-parser是Natural Intelligence开源的一个库。用于在没有基于 C/C++ 的库和回调的情况下，快速验证 XML、解析 XML 和构建 XML。 fast-xml-parser 5.7.0之前版本存在安全漏洞，该漏洞源于XMLBuilder未转义注释内容中的-->序列或CDATA部分中的]]>序列，可能导致XML注入，进而引发跨站脚本、SOAP注入或数据篡改。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| NaturalIntelligence | fast-xml-parser | < 5.7.0 | - |
II. Public POCs for CVE-2026-41650
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|---|
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IV. Related Vulnerabilities
Same product: fast-xml-parser
- CVE-2026-33349
fast-xml-parser: Entity Expansion Limits Bypassed When Set t - CVE-2026-33036
fast-xml-parser affected by numeric entity expansion bypassi - CVE-2026-27942
fast-xml-parser has stack overflow in XMLBuilder with preser - CVE-2026-25896
fast-xml-parser has an entity encoding bypass via regex inje - CVE-2026-26278
fast-xml-parser affected by DoS through entity expansion in
Same vendor: NaturalIntelligence
- CVE-2026-33349
fast-xml-parser: Entity Expansion Limits Bypassed When Set t - CVE-2026-33036
fast-xml-parser affected by numeric entity expansion bypassi - CVE-2026-27942
fast-xml-parser has stack overflow in XMLBuilder with preser - CVE-2026-25896
fast-xml-parser has an entity encoding bypass via regex inje - CVE-2026-26278
fast-xml-parser affected by DoS through entity expansion in
Same weakness: CWE-91
- CVE-2026-41675
xmldom: XML node injection through unvalidated processing in - CVE-2026-41674
xmldom: XML injection through unvalidated DocumentType seria - CVE-2026-41672
xmldom: XML node injection through unvalidated comment seria - CVE-2026-27693
traccar allows XML injection in KML and GPX exports - CVE-2026-32870
Kirby has XML injection in its XML creator toolkit
V. Comments for CVE-2026-41650
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