Input validation error in DOMPurify - #VU132385
Published: May 27, 2026
Vulnerability identifier: #VU132385
CSH Severity: Medium
CVSS v4: 5.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary script code in the context of the application.
The vulnerability exists due to improper input validation in the IN_PLACE sanitization mode when processing attacker-supplied DOM objects with attacker-controlled nodeName values on live non-form nodes. A remote attacker can supply a crafted DOM object to retain script-capable content and execute arbitrary script code in the context of the application.
The issue involves script retention on live non-form nodes.
Affected software
DOMPurify
Remediation
Install security update from vendor's website.
DOMPurify - update to 3.4.7