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.
History

Thu, 07 May 2026 15:45:00 +0000

Type Values Removed Values Added
First Time appeared Naturalintelligence
Naturalintelligence fast-xml-parser
Vendors & Products Naturalintelligence
Naturalintelligence fast-xml-parser

Thu, 07 May 2026 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 07 May 2026 14:30:00 +0000

Type Values Removed Values Added
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.
Title fast-xml-parser XMLBuilder: XML Comment and CDATA Injection via Unescaped Delimiters
Weaknesses CWE-91
References
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-05-07T15:08:36.208Z

Reserved: 2026-04-21T23:58:43.802Z

Link: CVE-2026-41650

cve-icon Vulnrichment

Updated: 2026-05-07T15:06:59.881Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-05-07T15:16:07.767

Modified: 2026-05-07T16:16:20.080

Link: CVE-2026-41650

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-07T15:30:05Z