CVE-2026-40301

MEDIUM 4.7

rhukster/dom-sanitizer: SVG <style> tag allows CSS injection via unfiltered url() and @import directives

CVSS Score

4.7

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-79
Vendor	rhukster
Product	dom-sanitizer
Published	Apr 17, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

None

Availability

None

Affected Versions

rhukster / dom-sanitizer

< 1.0.10

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/rhukster/dom-sanitizer/security/advisories/GHSA-93vf-569f-22cq github.com: https://github.com/rhukster/dom-sanitizer/commit/49a98046b708a4c92f754f5b0ef1720bb85142e2 github.com: https://github.com/rhukster/dom-sanitizer/releases/tag/1.0.10