#VU126317 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in DOMPurify
Published: April 16, 2026
Vulnerability identifier: #VU126317
Vulnerability risk: Medium
CVSSv4.0: 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/E:U/U:Green
CVE-ID: N/A
CWE-ID: CWE-79
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
DOMPurify
DOMPurify
Software vendor:
Cure53
Cure53
Description
The vulnerability allows a remote attacker to execute arbitrary script in the browser.
The vulnerability exists due to improper input validation in URI validation for ADD_ATTR predicate handling when sanitizing input with a predicate-based attribute allowlist. A remote attacker can supply crafted HTML containing a javascript: URL to execute arbitrary script in the browser.
User interaction is required to activate the malicious link.
Remediation
Install security update from vendor's website.