CVE-2026-49978

A flaw was found in DOMPurify, a tool designed to sanitize HTML, MathML, and SVG to prevent cross-site scripting XSS attacks. When performing in-place sanitization, DOMPurify could fail to properly process content within shadow DOM elements attached to a .content. This oversight allows an attacke...

DEBIAN-CVE-2026-49978

DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Prior to 3.4.7, DOMPurify INPLACE sanitization could skip shadow contents attached to an element inside .content, allowing attacker-controlled markup such as event handlers, JavaScript URLs, or scripts to survive an...

CVE-2026-49978

DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Prior to 3.4.7, DOMPurify INPLACE sanitization could skip shadow contents attached to an element inside .content, allowing attacker-controlled markup such as event handlers, JavaScript URLs, or scripts to survive an...

CVE-2026-49978

DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Prior to 3.4.7, DOMPurify INPLACE sanitization could skip shadow contents attached to an element inside .content, allowing attacker-controlled markup such as event handlers, JavaScript URLs, or scripts to survive an...

CVE-2026-49978 DOMPurify IN_PLACE Sanitization Bypass via Attached Shadow Root Inside <template>.content

DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Prior to 3.4.7, DOMPurify INPLACE sanitization could skip shadow contents attached to an element inside .content, allowing attacker-controlled markup such as event handlers, JavaScript URLs, or scripts to survive an...

CVE-2026-49458 DOMPurify: Cross-realm IN_PLACE sanitization leaves executable markup intact via realm-bound `instanceof` checks

DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Prior to 3.4.6, DOMPurify.sanitizenode, INPLACE: true accepted same-origin foreign-realm DOM nodes while follow-on checks used parent-realm constructors, causing instanceof checks for forms, named node maps, documen...

CVE-2026-49458

DOMPurify prior to v3.4.6 had a cross-realm IN_PLACE sanitization flaw where instanceof checks across realms allowed executable markup to bypass certain branches; fixed in v3.4.6. Affected: DOMPurify.sanitize with IN_PLACE in multi-realm scenarios. Mitigation: upgrade to DOMPurify 3.4.6 or later....

Cross-site Scripting (XSS)

Overview org.webjars.npm:dompurify is a DOM-only XSS sanitizer for HTML, MathML and SVG. Affected versions of this package are vulnerable to Cross-site Scripting XSS in the INPLACE process when attacker-controlled live DOM nodes are sanitized. An attacker can execute arbitrary scripts in the...

PT-2026-49557

Name of the Vulnerable Software and Affected Versions DOMPurify versions prior to 3.4.6 Description DOMPurify fails to properly sanitize DOM nodes from same-origin foreign realms such as those from an iframe, popup window, or opened tab when using the DOMPurify.sanitizenode, IN PLACE: true method...

PT-2026-49558

Name of the Vulnerable Software and Affected Versions DOMPurify versions prior to 3.4.6 Description When using DOMPurify.sanitizeroot, IN PLACE: true with a element as the root, an attacker can bypass attribute sanitization. This occurs if a descendant element has a name attribute that clobbers...