CVE-2026-116803

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 v3 6.1 MEDIUM

6.1^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 2.7

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact LOW

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

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

Configurations

No configuration.

History

31 Oct 2026, 03:17

Type	Values Removed	Values Added
References	~~() https://github.com/cure53/DOMPurify/security/advisories/GHSA-mrv2-3pqr-j5jr -~~	() https://github.com/cure53/DOMPurify/security/advisories/GHSA-mrv2-3pqr-j5jr -

27 Oct 2026, 00:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-27 00:17

Updated : 2026-10-31 03:17

NVD link : CVE-2026-116803

Mitre link : CVE-2026-116803

CVE.ORG link : CVE-2026-116803

JSON object : View

Products Affected

No product.

CWE

CWE-79

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

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