Vulnerability Description
xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. From 0.9.11 until 0.9.12, the requireWellFormed: true element and attribute name checks use the anchored QName_exact expression produced by reg() in lib/grammar.js, which inherits the multiline flag. A name with a valid first line followed by U+000A, U+000D, U+2028, or U+2029 and breakout markup therefore passes validation and is emitted verbatim in element start and end tags or attribute names. This bypasses the strict-serialization checks introduced for the earlier element-name and attribute-name injection advisories, while the default serialization path remains outside the strict guarantee. This issue is fixed in @xmldom/xmldom version 0.9.12.
Related Weaknesses (CWE)
References
- https://github.com/xmldom/xmldom/commit/7b2ec67e1750daadd0bb06c92e875e726544a362
- https://github.com/xmldom/xmldom/pull/1071
- https://github.com/xmldom/xmldom/releases/tag/0.9.12
- https://github.com/xmldom/xmldom/security/advisories/GHSA-jxjr-3g7g-3944
- https://github.com/xmldom/xmldom/security/advisories/GHSA-jxjr-3g7g-3944
FAQ
What is CVE-2026-83617?
CVE-2026-83617 is a documented vulnerability. xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. From 0.9.11 until 0.9.12, the requireWellFormed: true element and attribute name checks use th...
How severe is CVE-2026-83617?
CVSS scoring is not yet available for CVE-2026-83617. Check NVD for updates.
Is there a patch for CVE-2026-83617?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.