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7.5 High

CVE-2026-25128 fast-xml-parser allows users to validate XML, parse XML to JS object, or build XML from JS object without C/C++ based…

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. In versions 5.0.9 through 5.3.3, a RangeError vulnerability exists in the numeric entity processing of fast-xml-parser when parsing XML with out-of-range entity code points (e.g., `�` or `�`). This causes the parser to throw an uncaught exception, crashing any application that processes untrusted XML input. Version 5.3.4 fixes the issue.

Affected products and versions

Product Affected versions Fixed in
fast-xml-parser 5.0 5.0.9 → 5.3.3 No fix stated

References

Timeline

  1. Published
  2. Last modified

Other CVEs of fast-xml-parser

The 10 CVEs of fast-xml-parser →
CVE-2026-73569 fast-xml-parser allows users to process XML from JS object without C/C++ based libraries or callbacks 8.7 High CVE-2026-41650 fast-xml-parser allows users to process XML from JS object without C/C++ based libraries or callbacks 6.1 Medium CVE-2026-33349 fast-xml-parser allows users to process XML from JS object without C/C++ based libraries or callbacks 5.9 Medium CVE-2026-33036 fast-xml-parser allows users to process XML from JS object without C/C++ based libraries or callbacks 7.5 High
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