CVE-2026-49459
MEDIUMDOMPurify: IN_PLACE mode preserves attributes of a clobbered root element, allowing XSS via attacker-controlled root DOM
Title source: cnaDescription
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.
References (3)
Core 3
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/cure53/DOMPurify/security/advisories/GHSA-r47g-fvhr-h676
X_Refsource_Misc x_refsource_misc
https://github.com/cure53/DOMPurify/commit/bb7739e5bccec7e1ab3dae3f3e42d02db3acaaae
X_Refsource_Misc x_refsource_misc
https://github.com/cure53/DOMPurify/releases/tag/3.4.6
Scores
CVSS v3
6.1
EPSS
0.0030
EPSS Percentile
22.7%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-1321
CWE-693
CWE-79
Status
published
Products (2)
cure53/dompurify
< 3.4.6
cure53/DOMPurify
< 3.4.6
Published
Jul 14, 2026
Tracked Since
Jul 15, 2026