CVE-2026-41650 — MEDIUM (6.1)

Vulnerability 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.

CVSS Score

6.1

MEDIUM

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 Products

Vendor	Product	Versions
Naturalintelligence	Fast-Xml-Parser	< 5.7.0

Related Weaknesses (CWE)

CWE-91

References

https://github.com/NaturalIntelligence/fast-xml-parser/releases/tag/v5.6.0ProductRelease Notes
https://github.com/NaturalIntelligence/fast-xml-parser/security/advisories/GHSA-ExploitMitigationVendor Advisory
https://github.com/NaturalIntelligence/fast-xml-parser/security/advisories/GHSA-ExploitMitigationVendor Advisory

FAQ

What is CVE-2026-41650?

CVE-2026-41650 is a vulnerability with a CVSS score of 6.1 (MEDIUM). 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 "...

How severe is CVE-2026-41650?

CVE-2026-41650 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-41650?

Check the references section above for vendor advisories and patch information. Affected products include: Naturalintelligence Fast-Xml-Parser.