Home

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.

PUBLISHED Reserved 2026-02-25 | Published 2026-02-26 | Updated 2026-02-26 | Assigner GitHub_M




LOW: 2.7CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U

Problem types

CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

Product status

< 5.3.8
affected

References

github.com/...parser/security/advisories/GHSA-fj3w-jwp8-x2g3

github.com/NaturalIntelligence/fast-xml-parser/pull/791

github.com/...ommit/c13a961910f14986295dd28484eee830fa1a0e8a

cve.org (CVE-2026-27942)

nvd.nist.gov (CVE-2026-27942)

Download JSON