Bug 2500676 (CVE-2026-49459) - CVE-2026-49459 dompurify: DOMPurify: Cross-site scripting bypass allows arbitrary script execution
Summary: CVE-2026-49459 dompurify: DOMPurify: Cross-site scripting bypass allows arbit...
Keywords:
Status: NEW
Alias: CVE-2026-49459
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Product Security
QA Contact:
URL:
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-14 21:04 UTC by OSIDB Bzimport
Modified: 2026-07-15 09:54 UTC (History)
66 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-07-14 21:04:35 UTC 
DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Prior to 3.4.6, DOMPurify.sanitize(root, { IN_PLACE: true }) could preserve event-handler attributes on an attacker-controlled <form> root when a descendant name clobbered properties checked by _isClobbered, because _forceRemove no-opped on the parent-less root and _sanitizeAttributes returned early. This issue is fixed in version 3.4.6.
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