DOMPurify before 3.4.17 contains a cross-site scripting vulnerability that allows attackers to keep event handlers armed when an IN_PLACE hook removes a parent or sibling node. Attacker markup in detached subtrees is never walked or neutralized, so handlers like img onerror fire after sanitize() returns, causing DOM XSS.
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Sat, 31 Oct 2026 03:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 27 Oct 2026 12:30:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

threat_severity

Moderate


Tue, 27 Oct 2026 04:30:00 +0000

Type Values Removed Values Added
Description DOMPurify before 3.4.17 contains a cross-site scripting vulnerability that allows attackers to keep event handlers armed when an IN_PLACE hook removes a parent or sibling node. Attacker markup in detached subtrees is never walked or neutralized, so handlers like img onerror fire after sanitize() returns, causing DOM XSS.
Title DOMPurify before 3.4.17 DOM XSS via IN_PLACE Hook-Detached Subtrees
First Time appeared Cure53
Cure53 dompurify
Weaknesses CWE-79
CPEs cpe:2.3:a:cure53:dompurify:*:*:*:*:*:*:*:*
Vendors & Products Cure53
Cure53 dompurify
References
Metrics cvssV3_1

{'score': 6.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N'}

cvssV4_0

{'score': 5.1, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published:

Updated: 2026-10-31T02:06:02.382Z

Reserved: 2026-10-26T22:13:13.606Z

Link: CVE-2026-116803

cve-icon Vulnrichment

Updated: 2026-10-31T02:05:57.101Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-27T00:17:11.913

Modified: 2026-10-31T03:17:17.177

Link: CVE-2026-116803

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-10-26T23:05:35Z

Links: CVE-2026-116803 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-10-27T09:15:18Z

Weaknesses