CVE-2026-25896
NaturalIntelligence fast-xml-parser, Red Hat Advanced Cluster Security 4.8, Red Hat Advanced Cluster Security 4.9 취약점
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.
- 대응 우선순위
- 점검
- CVSS
- 9.3
- EPSS
- 0.46% 백분위 37.8% · 2026.08.03 기준
- CISA KEV
- 미등록
- 조치 기한
- -
- 공개일
- 2026.02.21