CVE-2026-41650
fast-xml-parser XMLBuilder: XML Comment and CDATA Injection via Unescaped Delimiters
CVSS Score
6.1
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-91 |
| Vendor | naturalintelligence |
| Product | fast-xml-parser |
| Published | May 7, 2026 |
| Last Updated | May 7, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Changed
Confidentiality
Low
Integrity
Low
Availability
None
Affected Versions
NaturalIntelligence / fast-xml-parser
< 5.7.0