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CVE-2026-25896

High

High exploit probability or critical severity with a known exploit.

CVSS base
9.3 CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N
EPSS — probability of exploitation (30 days)
0.5%
39.3th percentile
CISA KEV
Not listed
Weakness / dates
CWE-79
Published 2026-02-20 · modified 2026-09-10

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. 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.

Affected

naturalintelligence

References

Official: NVD · CVE.org