Improper Check for Unusual or Exceptional Conditions Affecting dompurify package, versions <3.4.4
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-DOMPURIFY-18307177
- published25 Jul 2026
- disclosed23 Jul 2026
- creditUnknown
Introduced: 23 Jul 2026
NewCVE-2026-65904 (opens in a new tab)How to fix?
Upgrade dompurify to version 3.4.4 or higher.
Overview
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 IN_PLACE process when DOM elements are passed from a different window or realm, such as an iframe's contentDocument. An attacker can inject and execute arbitrary scripts by supplying a crafted DOM element from a foreign realm, which bypasses sanitization and leaves malicious payloads intact. This is only exploitable if the application uses the IN_PLACE mode with DOM elements originating from a different window or realm.