CVE-2026-27942 - fast-xml-parser has stack overflow in XMLBuilder with preserveOrder

CVE ID : CVE-2026-27942 Published : Feb. 26, 2026, 2:16 a.m. | 50 minutes ago 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. Severity: 2.7 | LOW Visit the link for more details, such as CVSS details, affected products, timeline, and more...