Improper Check for Unusual or Exceptional Conditions

Overview org.webjars.npm:dompurify is a DOM-only XSS sanitizer for HTML, MathML and SVG. Affected versions of this package are vulnerable to Improper Check for Unusual or Exceptional Conditions in the INPLACE process when DOM elements are passed from a different window or realm, such as an iframe...

CVE-2026-65904 DOMPurify through 3.3.3 Cross-Site Scripting via IN_PLACE mode

DOMPurify through 3.3.3 fails to sanitize DOM elements passed via INPLACE mode when the element originates from a different window/realm e.g., an iframe's contentDocument. A cross-realm instanceof check in the private isNode function returns false for foreign-realm nodes, causing DOMPurify to...

CVE-2026-65904

CVE-2026-65904 affects DOMPurify up to version 3.4.3. In IN_PLACE mode, elements sourced from a different window/realm (e.g., iframe contentDocument) fail sanitization due to a cross-realm instanceof check in private _isNode(). The check returns false for foreign-realm nodes, causing the element ...

DEBIAN-CVE-2026-49458

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 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...

UBUNTU-CVE-2026-49458

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 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...

GHSA-HPCV-96WG-7VJ8 DOMPurify: Cross-realm IN_PLACE sanitization leaves executable markup intact via realm-bound `instanceof` checks

Cross-realm INPLACE sanitization leaves executable markup intact via realm-bound instanceof checks CWE: CWE-79 XSS — Improper Neutralization of Input During Web Page Generation via CWE-693 Protection Mechanism Failure — realm-bound instanceof checks fail-open on foreign-realm DOM nodes and CWE-50...

Trust Boundary Violation

Overview org.webjars.npm:dompurify is a DOM-only XSS sanitizer for HTML, MathML and SVG. Affected versions of this package are vulnerable to Trust Boundary Violation in the sanitize function when handling DOM nodes from a different same-origin realm due to improper realm-bound instanceof checks. ...

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

Cross-realm INPLACE sanitization leaves executable markup intact via realm-bound instanceof checks CWE: CWE-79 XSS — Improper Neutralization of Input During Web Page Generation via CWE-693 Protection Mechanism Failure — realm-bound instanceof checks fail-open on foreign-realm DOM nodes and CWE-50...

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...