CVE-2026-41650
Medium
Description
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.
SeverityMedium
CVSS6.1
Exploit probability—
ProductNaturalintelligence Fast-xml-parser
PublishedMay 7, 2026
First seenMay 7, 2026
Weakness typeCWE-91CWE-91
How to fix
Update
- naturalintelligence fast-xml-parser5.7.0 or later
- fast-xml-parser5.7.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| naturalintelligence fast-xml-parser | v < 5.7.0 | 5.7.0 |
| fast-xml-parsernpm | v < 5.7.0 | 5.7.0 |
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