CVE-2026-25896

01/תיאור (מקור, אנגלית)

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.

02/מוצרים מושפעים

naturalintelligence: fast-xml-parser

03/קישורים10

• github.com/NaturalIntelligence/fast-xml-parser/security/adviso‮… ExploitMitigationVendor Advisory
• github.com/NaturalIntelligence/fast-xml-parser/commit/943ef0eb‮… Patch
• github.com/NaturalIntelligence/fast-xml-parser/commit/ddcd0acf‮… Patch
• github.com/NaturalIntelligence/fast-xml-parser/releases/tag/v5‮… ProductRelease Notes
• access.redhat.com/errata/RHSA-2026:40984
• access.redhat.com/errata/RHSA-2026:41941
• access.redhat.com/errata/RHSA-2026:41944
• access.redhat.com/errata/RHSA-2026:51349
• access.redhat.com/errata/RHSA-2026:6174
• access.redhat.com/errata/RHSA-2026:6802