CVE-2026-49459
DOMPurify: IN_PLACE mode preserves attributes of a clobbered root element, allowing XSS via attacker-controlled root DOM
MEDIUM 6.1EPSS 0.4%
DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. Prior to 3.4.6, DOMPurify.sanitize(root, { IN_PLACE: true }) could preserve event-handler attributes on an attacker-controlled <form> root when a descendant name clobbered properties checked by _isClobbered, because _forceRemove no-opped on the parent-less root and _sanitizeAttributes returned early. This issue is fixed in version 3.4.6.
- Affected
- cure53 · DOMPurify
- CVSS v3.1 GITHUB
- 6.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N - EPSS
- 0.36% chance of exploitation in the next 30 days, 29th percentile
- Published
- 2026-07-14
- Updated
- 2026-07-15
Proof-of-concept exploits (1)
Security advisories
- cure53/DOMPurify/security/advisories/GHSA-r47g-fvhr-h676
- cure53/DOMPurify/commit/bb7739e5bccec7e1ab3dae3f3e42d02db3acaaae