CVE-2026-83605High· 8.1▾ Twilightxmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. Prior to @xmldom/xmldom versions 0.8.14 and 0.9.11, and in xmldom version 0.6.0 and earlier, Element.setAttribute() calls the priva…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 44.6 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Sep 8.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.3%
— → 8.1
xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. Prior to @xmldom/xmldom versions 0.8.14 and 0.9.11, and in xmldom version 0.6.0 and earlier, Element.setAttribute() calls the private _createAttribute(name) path without validating the attribute name, while Document.createAttribute(name) validates against QName. XMLSerializer.serializeToString() emits attribute names verbatim, and requireWellFormed: true did not validate them, so a crafted name can terminate the intended attribute and inject additional attributes, including event handlers, into browser-consumed output; synthesized xmlns:PREFIX declarations expose the same unchecked-name boundary. This issue is fixed in @xmldom/xmldom versions 0.8.14 and 0.9.11; no fixed version is available for xmldom.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
@xmldom/xmldom >= 0.9.0, <= 0.9.10@xmldom/xmldom >= 0.7.0, <= 0.8.13xmldom <= 0.6.0Patched in:
@xmldom/xmldom 0.9.11@xmldom/xmldom 0.8.14Source: https://github.com/advisories/GHSA-4w3w-2rp5-g8jm
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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