CVE-2026-41650

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.

CVSS v3 6.1 MEDIUM

6.1^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/NaturalIntelligence/fast-xml-parser/releases/tag/v5.6.0	Product Release Notes
https://github.com/NaturalIntelligence/fast-xml-parser/security/advisories/GHSA-gh4j-gqv2-49f6	Exploit Mitigation Vendor Advisory
https://github.com/NaturalIntelligence/fast-xml-parser/security/advisories/GHSA-gh4j-gqv2-49f6	Exploit Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:naturalintelligence:fast-xml-parser:*:*:*:*:*:*:*:*

History

26 Oct 2026, 20:10

Type	Values Removed	Values Added
Summary		(es) fast-xml-parser permite a los usuarios procesar XML desde objetos JS sin bibliotecas basadas en C/C++ ni devoluciones de llamada. Antes de la versión 5.7.0, XMLBuilder no escapa la secuencia ’ - ’ en el contenido de los comentarios ni la secuencia ’]]>’ en las secciones CDATA al construir XML a partir de objetos JavaScript. Esto permite la inyección de XML cuando los datos controlados por el usuario fluyen hacia comentarios o elementos CDATA, lo que lleva a XSS, inyección SOAP o manipulación de datos. Este problema ha sido parcheado en la versión 5.7.0.

Information

Published : 2026-05-07 15:16

Updated : 2026-10-26 20:10

NVD link : CVE-2026-41650

Mitre link : CVE-2026-41650

CVE.ORG link : CVE-2026-41650

JSON object : View

Products Affected

naturalintelligence

fast-xml-parser

CWE

CWE-91

XML Injection (aka Blind XPath Injection)

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