Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2026-49978

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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.003
EPSS Ranking 25.9%
CVSS Severity
CVSS v3 Score 6.1
Products affected by CVE-2026-49978


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