CVE-2026-83617

CVE-2026-83617 · xmldom: requireWellFormed element/attribute name validation is bypassable via an embedded line terminator

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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.

CVSS 8.7 · Высокий · EPSS 0,6% · Есть исправление

Опубликовано

2026-09-01T14:47:46.526Z

Обновлено

2026-09-01T15:30:45.725Z

Стек: system · node

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