What is CVE-2026-40301?

CVE-2026-40301 is a medium-severity vulnerability in Rhukster Dom-sanitizer, classified under Cross-site Scripting. CVSS score: 4.7/10. Published 2026-04-17.

How severe is CVE-2026-40301?

Medium severity. CVSS v3 base score is 4.7 out of 10.

XSS in Rhukster Dom-sanitizer

CVE-2026-40301

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 un…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (10.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N.

Affected products

Rhukster Dom-sanitizer — versions < 1.0.10

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

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

Frequently asked questions

What is CVE-2026-40301?: CVE-2026-40301 is a medium-severity vulnerability in Rhukster Dom-sanitizer, classified under Cross-site Scripting. CVSS score: 4.7/10. Published 2026-04-17.
How severe is CVE-2026-40301?: Medium severity. CVSS v3 base score is 4.7 out of 10.