CVE-2026-40301
Medium
Description
DOMSanitizer is a DOM/SVG/MathML Sanitizer for PHP 7.3+. Prior to version 1.0.10, DOMSanitizer::sanitize() allows <style> elements in SVG content but never inspects their text content. CSS url() references and @import rules pass through unfiltered, causing the browser to issue HTTP requests to attacker-controlled hosts when the sanitized SVG is rendered. Version 1.0.10 fixes the issue.
SeverityMedium
CVSS4.7
Exploit probability—
ProductRhukster/dom-sanitizer
PublishedApr 17, 2026
First seenApr 17, 2026
Weakness typeCWE-79Cross-site scripting (XSS)
How to fix
Update
- rhukster/dom-sanitizer1.0.10 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| rhukster/dom-sanitizerPackagist | v < 1.0.10 | 1.0.10 |
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