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CVE PROGRAM SOURCE RECORD6.3 Medium

CVE-2026-49978

DOMPurify IN_PLACE Sanitization Bypass via Attached Shadow Root Inside <template>.content

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Status
Published
Published
Updated
Assigning organization
GitHub_M

Description

DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Prior to 3.4.7, DOMPurify IN_PLACE sanitization could skip shadow contents attached to an element inside <template>.content, allowing attacker-controlled markup such as event handlers, JavaScript URLs, or scripts to survive and execute when an application cloned and inserted the sanitized template. This issue is fixed in version 3.4.7.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

cure53 DOMPurify

  • < 3.4.6affected

References