Medium 6.1Published Oct 26, 2026

CVE-2026-116803DOMPurify before 3.4.17 DOM XSS via IN_PLACE Hook-Detached Subtrees

Updated under an hour ago (Oct 28, 2026, 3:40 PM ET)

Does this affect you?

It affects cure53 DOMPurify. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for cure53 DOMPurify

Exploited in the last 30 days

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.

CVSS: 6.1 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE): CWE-79
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: VulnCheck
NVD analysis: Awaiting Analysis
Record last updated: Oct 26, 2026
First seen by InfoSec Signals: Oct 26, 2026

Affected products

Affected products

cure53 DOMPurify cure53:dompurify (from the name)	before 3.4.17; 3.4.17 not affected	CNA record

References

References

https://github.com/cure53/DOMPurify/security/advisories/GHSA-mrv2-3pqr-j5jr	vendor-advisory
https://www.vulncheck.com/advisories/dompurify-before-3.4.17-dom-xss-via-in-place-hook-detached-subtrees	third-party-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.