Input validation error in SVG Sanitizer - #VU146563
Published: September 1, 2026
Vulnerability identifier: #VU146563
CSH Severity: Low
CVSS v4: 4.8 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:L/VI:N/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 user to load external resources and disclose limited information.
The vulnerability exists due to improper input validation in the hasRemoteReference() check in the SVG Sanitizer when parsing unquoted url() values. A remote user can provide a crafted SVG attribute containing an unquoted external url() reference to load external resources and disclose limited information.
The issue occurs because the remote reference check only matches quoted url() values.
Affected software
SVG Sanitizer
Remediation
Install security update from vendor's website.
SVG Sanitizer - update to 1.0.0