Vulnerability Description
xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. From 0.7.0 until 0.8.15, the release-0.8.x parser in lib/sax.js trims captured end-tag names with the unanchored global expression /[ \t\n\r]+$/g. For an end tag containing a long whitespace run followed by a non-whitespace character, the expression retries from each possible starting position and backtracks quadratically before failing its end anchor. DOMParser.parseFromString() reaches the path under default options, allowing a small unauthenticated XML input to stall the Node.js event loop; the 0.9.x and unscoped npm lines do not contain this expression. This issue is fixed in @xmldom/xmldom version 0.8.15.
Related Weaknesses (CWE)
References
- https://github.com/xmldom/xmldom/commit/3abb0934f5a8a84d83a1f9cde0f2bd04c08b2a09
- https://github.com/xmldom/xmldom/pull/1072
- https://github.com/xmldom/xmldom/releases/tag/0.8.15
- https://github.com/xmldom/xmldom/security/advisories/GHSA-x4fp-j954-r2f4
FAQ
What is CVE-2026-83619?
CVE-2026-83619 is a documented vulnerability. xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. From 0.7.0 until 0.8.15, the release-0.8.x parser in lib/sax.js trims captured end-tag names w...
How severe is CVE-2026-83619?
CVSS scoring is not yet available for CVE-2026-83619. Check NVD for updates.
Is there a patch for CVE-2026-83619?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.