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CVE PROGRAM SOURCE RECORD5.1 Medium

CVE-2026-116802

DOMPurify before 3.4.17 XSS via SMIL attributeName Guard Bypass in XHTML Mode

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Status
Published
Published
Updated
Assigning organization
VulnCheck

Description

DOMPurify before 3.4.17 contains a cross-site scripting vulnerability that allows attackers to bypass the SMIL attributeName=href guard when PARSER_MEDIA_TYPE is application/xhtml+xml, because transformCaseFunc does not lowercase attribute names. Attackers can submit SVG with an animate or set element using attributeName="href" and a javascript: entry in values to execute script when users click the sanitized link.

Affected products

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

cure53 DOMPurify

Default version status: unaffected

  • 0 to < 3.4.17affected
  • 3.4.17unaffected
pkg:npm/dompurify

References