← Vulnerability feed

Vulnerability record · CVE-2026-41650 · published 7 May 2026

CVE-2026-41650: Naturalintelligence fast-xml-parser xml injection vulnerability

Naturalintelligence · Fast Xml Parser

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.

6.1 CVSS 3.1 Medium EPSS 0.27% · top 82.5% CWE-91 · XML injection
6.1CVSS 3.1 base score
0.27%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
3References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/NaturalIntelligence/fast-xml-parser/releases/tag/v5.6.0 ProductRelease Notes
https://github.com/NaturalIntelligence/fast-xml-parser/security/advisories/GHSA-gh4j-gqv2-49f6 ExploitMitigationVendor Advisory
https://github.com/NaturalIntelligence/fast-xml-parser/security/advisories/GHSA-gh4j-gqv2-49f6 ExploitMitigationVendor Advisory

Track CVE-2026-41650 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.3CVE-2026-25896Naturalintelligence fast-xml-parser cross-site scripting vulnerabilityfast-xml-parser allows users to validate XML, parse XML to JS object, or build XML from JS object without C/C++ based libraries and no callback. From…EPSS 0.50%7.5CVE-2026-33036Naturalintelligence fast-xml-parser vulnerabilityfast-xml-parser allows users to process XML from JS object without C/C++ based libraries or callbacks. Versions 4.0.0-beta.3 through 5.5.5 contain a …EPSS 0.73%7.5CVE-2026-26278Naturalintelligence fast-xml-parser vulnerabilityfast-xml-parser allows users to validate XML, parse XML to JS object, or build XML from JS object without C/C++ based libraries and no callback. In v…EPSS 0.97%7.5CVE-2026-25128Naturalintelligence fast-xml-parser improper input validation vulnerabilityfast-xml-parser allows users to validate XML, parse XML to JS object, or build XML from JS object without C/C++ based libraries and no callback. In v…EPSS 0.58%7.5CVE-2024-41818Naturalintelligence fast-xml-parser uncontrolled resource consumption vulnerabilityfast-xml-parser is an open source, pure javascript xml parser. a ReDOS exists on currency.js. This vulnerability is fixed in 4.4.1.EPSS 0.83%7.5CVE-2023-34104Naturalintelligence fast-xml-parser uncontrolled resource consumption vulnerabilityfast-xml-parser is an open source, pure javascript xml parser. fast-xml-parser allows special characters in entity names, which are not escaped or sa…EPSS 1.1%5.9CVE-2026-33349Naturalintelligence fast-xml-parser vulnerabilityfast-xml-parser allows users to process XML from JS object without C/C++ based libraries or callbacks. From version 4.0.0-beta.3 to before version 5.…EPSS 0.48%2.7CVE-2026-27942Naturalintelligence fast-xml-parser classic buffer overflow vulnerabilityfast-xml-parser allows users to validate XML, parse XML to JS object, or build XML from JS object without C/C++ based libraries and no callback. Prio…EPSS 0.66%

Source: NIST National Vulnerability Database (record CVE-2026-41650), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.