CVE-2026-41650
fast-xml-parser allows users to process XML from JS object without C/C++ based libraries or callbacks. Prior to version 5.7.0, XMLBuilder does not escape the "-->" sequence in comment content or the "]]>" sequence in CDATA sections when building XML from JavaScript objects. This allows XML injection when user-controlled data flows into comments or CDATA elements, leading to XSS, SOAP injection, or data manipulation. This issue has been patched in version 5.7.0.
Scoring
- Severity
- MEDIUM
- CVSS base score
- 6.1
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
- EPSS probability
- 0.24%
- CWE
- CWE-91
- Published
- 2026-05-07
- Last modified
- 2026-05-07
Affected products
- NaturalIntelligence fast-xml-parser
Weakness type
Related vulnerabilities
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- CVE-2026-83609 — xmldom: Creation-time XML Name/QName validation is bypassable via an embedded line terminator, allowing injection on the default serialization path
- CVE-2026-83608 — xmldom: DocType `name` Injection Bypasses requireWellFormed
- CVE-2026-83607 — xmldom: Element name injection via createElement() bypasses requireWellFormed
- CVE-2026-83605 — xmldom: Attribute name injection via setAttribute() bypasses requireWellFormed