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:
URL:
Whiteboard:
Depends On:
Blocks:
TreeView+ depends on / blocked
 
Reported: 2026-07-14 21:05 UTC by OSIDB Bzimport
Modified: 2026-08-27 20:35 UTC (History)
106 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed:
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Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2026:57590 0 None None None 2026-08-20 16:07:38 UTC
Red Hat Product Errata RHSA-2026:59360 0 None None None 2026-08-25 10:07:35 UTC

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.
Comment 7 errata-xmlrpc 2026-08-20 16:07:32 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 10

Via RHSA-2026:57590 https://access.redhat.com/errata/RHSA-2026:57590
Comment 8 errata-xmlrpc 2026-08-25 10:07:30 UTC 
This issue has been addressed in the following products:

  Red Hat build of Apicurio Registry 3.3.1

Via RHSA-2026:59360 https://access.redhat.com/errata/RHSA-2026:59360
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