CVE-2026-41650
fast-xml-parser XMLBuilder: XML Comment and CDATA Injection via Unescaped Delimiters
6.1
MEDIUM
CVSS 3.1
EPSS 0.01%
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.
How to fix CVE-2026-41650
To remediate CVE-2026-41650, upgrade the affected package to a fixed version below.
- —no fix listed
- —upgrade to 5.7.0 or later
Is CVE-2026-41650 being exploited?
Low — EPSS is 0.0%, meaning exploitation activity has not been observed at scale.
Affected packages (2)
- from 0
- from 0, < 5.7.0
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N |