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CVE-2026-25128 PUBLISHED CVSS 7.5 HIGH

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.

EPSS 0.07% · 22.2th percentile

Risk Scores

CVSS v3.1
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
EPSS Score
0.07%
22.2th percentile

Affected Products

VendorProductVersions
npmfast-xml-parser5.0.9
naturalintelligencefast-xml-parser5.0.9
NaturalIntelligencefast-xml-parser>= 5.0.9, <= 5.3.3

Timeline

References

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