CVE Watch10 sept 2026

CVE-2026-25896

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 callb

CVSS

9.3

Crítico

EPSS

0.5%

p39

KEV

—

Exploit Today

0-100

Publicado: 20 feb 2026 · Última mod.: 10 sept 2026 · CWE-185 · CWE-79

EPSS · 30d

0.5%EPSS · 30 días0.5%

2026-08-132026-09-09

Descripción técnica

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. From 4.1.3to before 5.3.5, a dot (.) in a DOCTYPE entity name is treated as a regex wildcard during entity replacement, allowing an attacker to shadow built-in XML entities (<, >, &, ", ') with arbitrary values. This bypasses entity encoding and leads to XSS when parsed output is rendered. This vulnerability is fixed in 5.3.5.

Referencias oficiales

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