Bug 2500695 (CVE-2026-49978) - CVE-2026-49978 dompurify: DOMPurify: Cross-site scripting vulnerability allows code execution
Summary: CVE-2026-49978 dompurify: DOMPurify: Cross-site scripting vulnerability allow...
Keywords:
Status: NEW
Alias: CVE-2026-49978
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
high
high
Target Milestone: ---
Assignee: Product Security DevOps Team
QA Contact:
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Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-14 21:05 UTC by OSIDB Bzimport
Modified: 2026-07-17 15:59 UTC (History)
91 users (show)

Fixed In Version:
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Description OSIDB Bzimport 2026-07-14 21:05:50 UTC 
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.
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