Description
DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Prior to 3.4.7, DOMPurify IN_PLACE sanitization could skip shadow contents attached to an element inside <template>.content, allowing attacker-controlled markup such as event handlers, JavaScript URLs, or scripts to survive and execute when an application cloned and inserted the sanitized template. This issue is fixed in version 3.4.7.
Affected products
cure53: dompurify
References4
- github.com/cure53/DOMPurify/security/advisories/GHSA-rp9w-3fw7-… Vendor AdvisoryExploit
- github.com/cure53/DOMPurify/security/advisories/GHSA-rp9w-3fw7-… Vendor AdvisoryExploit
- github.com/cure53/DOMPurify/commit/ca30f070c360df162a3e3848e80e… Patch
- github.com/cure53/DOMPurify/releases/tag/3.4.7 Release Notes
Metrics
- CVSS 3.1
-
6.1
MEDIUM
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - CVSS 4.0
-
6.3
MEDIUM
Score source: CNA
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:H/SI:H/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - EPSS — exploit probability
- 0% percentile: 35 · as of 15 November 2026
- CWE
- CWE-79
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