#VU123128 Incorrect Regular Expression in fast-xml-parser - CVE-2026-25896

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Main Vulnerability Database Vulnerabilities #VU123128

#VU123128 Incorrect Regular Expression in fast-xml-parser - CVE-2026-25896

Published: February 23, 2026


Vulnerability identifier: #VU123128
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:H/SA:N/E:P/U:Green
CVE-ID: CVE-2026-25896
CWE-ID: CWE-185
Exploitation vector: Remote access
Exploit availability: Public exploit is available
Vulnerable software:
fast-xml-parser
Software vendor:
Natural Intelligence

Description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to insufficient input validation when processing regular expressions in DOCTYPE entity names. A remote attacker can bypass the XML entity encoding.


Remediation

Install updates from vendor's website.

External links