CVE-2026-65904 — Security Box Score

CVE · referencelatest edition

Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-65904LOW

cure53 DOMPurify — DOMPurify through 3.3.3 Cross-Site Scripting via IN_PLACE mode

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   H   P   N   P   N   N   N    2.3   .0016    6.2     —

AFFECTED
  Product    Versions     Fixed
  DOMPurify  unspecified  —

TIMELINE
  Jul 23  EXPLOIT PUBLISHED — CVE-2026-65904 (cure53 DOMPurify). Public exploit reference added.
  Jul 23  Reserved by VulnCheck
  Jul 23  Published (CNA: VulnCheck)
  Jul 28  EXPLOIT PUBLISHED — CVE-2026-65904 (cure53 DOMPurify). Public exploit reference added.

CWE-754 · CNA: VulnCheck · CVSS v4.0 · 2 references · NVD status: Analyzed

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.

Lifecycle

Complete event history — 4 events, chronological
Date	Event	Detail
July 23, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-65904 (cure53 DOMPurify). Public exploit reference added.
July 23, 2026	Reserved	Reserved by VulnCheck
July 23, 2026	Published	Published (CNA: VulnCheck)
July 28, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-65904 (cure53 DOMPurify). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
cure53	DOMPurify	—	—	—

Weaknesses

CWE-754

References (2)

https://github.com/cure53/DOMPurify/security/advisories/GHSA-4w3q-35jp-p934 [Exploit, Third Party Advisory]
https://www.vulncheck.com/advisories/dompurify-before-cross-site-scripting-via-in-place-mode [Third Party Advisory]

Authoritative record: CVE-2026-65904 at cve.org

Vendors: cure53

Weaknesses: CWE-754

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-65904 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.