Bug 2520428 - CVE-2026-65901 nextcloud: DOMPurify: Cross-site scripting vulnerability via attacker-controlled nodeName [epel-all]
Summary: CVE-2026-65901 nextcloud: DOMPurify: Cross-site scripting vulnerability via a...
Keywords:
Status: CLOSED CURRENTRELEASE
Alias: None
Product: Fedora EPEL
Classification: Fedora
Component: nextcloud
Version: epel10
Hardware: Unspecified
OS: Unspecified
medium
medium
Target Milestone: ---
Assignee: Andrew Bauer
QA Contact: Fedora Extras Quality Assurance
URL:
Whiteboard: {"flaws": ["312dd941-35ce-4f58-830d-a...
Depends On:
Blocks: CVE-2026-65901
TreeView+ depends on / blocked
 
Reported: 2026-08-20 15:59 UTC by Ganesh
Modified: 2026-08-20 16:38 UTC (History)
2 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2026-08-20 16:38:57 UTC
Type: ---
Embargoed:

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Description Ganesh 2026-08-20 15:59:47 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 Andrew Bauer 2026-08-20 16:38:57 UTC 
This bug is not valid. As of this writing, the current Nextcloud 34.0.3 release contain DOMPurify 3.4.13 which does not contain this CVE.

See:
https://github.com/nextcloud/server/blob/v34.0.3/package-lock.json#L6512
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