CVE-2026-25896

high Red Hat
CVSS v3 Base Score
7.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L
Published: February 20, 2026
Last Modified: February 20, 2026
Vendor: Red Hat

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.

CWE

CWE-79

Affected Products

Migration Toolkit for Applications 8Red Hat Advanced Cluster Security 4Red Hat Developer HubRed Hat Openshift Data Foundation 4Red Hat OpenShift GitOpsRed Hat OpenShift Virtualization 4Red Hat Satellite 6Self-service automation portal 2

References

🔗 bugzilla.redhat.com 🔗 www.cve.org 🔗 nvd.nist.gov 🔗 github.com 🔗 github.com