Bug 2520458

Summary:	CVE-2026-65901 jupyterlab: DOMPurify: Cross-site scripting vulnerability via attacker-controlled nodeName [fedora-all]
Product:	[Fedora] Fedora	Reporter:	Ganesh <gnaik>
Component:	jupyterlab	Assignee:	Lumír Balhar <lbalhar>
Status:	NEW ---	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	rawhide	CC:	lbalhar, python-packagers-sig, romain.geissler
Target Milestone:	---	Keywords:	Security, SecurityTracking
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:	{"flaws": ["312dd941-35ce-4f58-830d-ab83ed6d0faa"]}
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:
Bug Blocks:	2506432

Description Ganesh 2026-08-20 16:03:18 UTC

Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

DOMPurify through 3.4.6 contains a cross-site scripting vulnerability in IN_PLACE mode that trusts attacker-controlled nodeName on live non-form nodes. Attackers can supply hostile live DOM objects with real script children whose observable nodeName is clobbered to appear as allowed elements, causing scripts to execute when the sanitized tree is inserted into a live document.

Comment 1 Lumír Balhar 2026-10-12 08:36:01 UTC

Fixed in rawhide, f45 and older still affected.

Comment 2 Lumír Balhar 2026-10-14 11:58:15 UTC

I've just created an update for Jupyterlab (to 4.6.3) and related packages for F45 which is going to fix this vulnerability.