PT-2026-34614 · Npm · Fast-Xml-Parser

Tharvid · Published 2026-04-22 · Updated 2026-05-18 · CVE-2026-41650

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Name of the Vulnerable Software and Affected Versions fast-xml-parser versions prior to 5.7.0

Description XMLBuilder fails to escape the "-->" sequence in comment content and the ">>" sequence in CDATA sections when generating XML from JavaScript objects. This flaw enables XML injection if user-controlled data is included in comments or CDATA elements, which can result in cross-site scripting (XSS), SOAP injection, or data manipulation.

Recommendations Update to version 5.7.0.

Exploit

Fix

Weakness Enumeration

CWE-91

Related Identifiers

CLEANSTART-2026-AD27625

CVE-2026-41650

GHSA-GH4J-GQV2-49F6

Affected Products

Fast-Xml-Parser

References · 84

• 🔥 https://github.com/NaturalIntelligence/fast-xml-parser/security/advisories/GHSA-gh4j-gqv2-49f6 · Exploit
• https://ubuntu.com/security/CVE-2026-41650 · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2026-41650 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2026-33349 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-33036 · Security Note
• https://cve.org/CVERecord?id=CVE-2026-41650 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-31802 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-69873 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-26960 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-4926 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-41650 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-2950 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-23745 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2025-25285 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2026-33916 · Security Note