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CVE-2026-27942

HIGH CVSS: 7.5 Published: 2026-02-26 Modified: 2026-06-17

Description

fast-xml-parser allows users to validate XML, parse XML to JS object, or build XML from JS object without C/C++ based libraries and no callback. Prior to version 5.3.8, the application crashes with stack overflow when user use XML builder with `preserveOrder:true`. Version 5.3.8 fixes the issue. As a workaround, use XML builder with `preserveOrder:false` or check the input data before passing to builder.

Affected Platforms

Naturalintelligence Fast-Xml-Parser

Weakness Type

CWE-120

References