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CVE-2026-25128
JavaScript vulnerability analysis and mitigation

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.


SourceNVD

Related JavaScript vulnerabilities:

CVE ID

Severity

Score

Technologies

Component name

CISA KEV exploit

Has fix

Published date

CVE-2026-34156CRITICAL9.9
  • JavaScriptJavaScript
  • @nocobase/plugin-workflow-javascript
NoYesMar 30, 2026
CVE-2026-34363HIGH8.2
  • JavaScriptJavaScript
  • parse-server
NoYesMar 30, 2026
CVE-2026-33949HIGH8.1
  • JavaScriptJavaScript
  • @tinacms/graphql
NoYesMar 30, 2026
CVE-2026-34043MEDIUM5.9
  • JavaScriptJavaScript
  • serialize-javascript
NoYesMar 31, 2026
CVE-2026-34373MEDIUM5.3
  • JavaScriptJavaScript
  • parse-server
NoYesMar 30, 2026

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