CVE-2026-65904 | BDVDB-2026-352180 Detail

Description#

DOMPurify through 3.3.3 fails to sanitize DOM elements passed via IN_PLACE 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 stringify the element (yielding '[object HTMLDivElement]'), silently reset IN_PLACE to false, and return the unsanitized element unchanged with any XSS payloads intact.

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Exploit#

History#

1. Version 12026-07-23Record published in the CVE List.
2. Version 22026-07-24Most recent update recorded in the CVE List.