CVE-2026-83612
Description
xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. From 0.9.0-beta.1 until 0.9.12, HTML-mode parsing through DOMParser.parseFromString() mishandles a mixed-case closing tag for the script, style, textarea, or title raw-text elements. parseHtmlSpecialContent, selected by isHTMLRawTextElement or isHTMLEscapableRawTextElement, uses a case-sensitive indexOf() and then calls substring() with a missing-close result of negative one, causing unstable parser progression and quadratic output amplification. A small untrusted text/html document can consequently consume disproportionate CPU and memory when parsed and serialized. This issue is fixed in @xmldom/xmldom version 0.9.12.
How to fix
- @xmldom/xmldom0.9.12 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| @xmldom/xmldomnpm | 0.9.0-beta.1 ≤ v < 0.9.12 | 0.9.12 |
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Attack Surface Management
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