Fluid Attacks Database

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.

Mitigation

Update Impact

Minimal update. May introduce new vulnerabilities or breaking changes.

Ecosystem	Component	Affected version	Patched versions
debian 13	node-dompurify	=3.1.7+dfsg+~3.0.5-2 \|\| =3.2.5+dfsg-1 \|\| =3.3.2+dfsg-1 \|\| =3.3.3+dfsg-1 \|\| =3.3.3+dfsg-2 \|\| =3.4.1+dfsg-1 \|\| =3.4.12+dfsg-1 \|\| =3.4.13+dfsg-1 \|\| =3.4.13+dfsg-2 \|\| =3.4.16+dfsg-1 \|\| =3.4.2+dfsg-1 \|\| =3.4.5+dfsg-1	-
debian 14	node-dompurify	=3.1.7+dfsg+~3.0.5-2 \|\| =3.2.5+dfsg-1 \|\| =3.3.2+dfsg-1 \|\| =3.3.3+dfsg-1 \|\| =3.3.3+dfsg-2 \|\| =3.4.1+dfsg-1 \|\| =3.4.2+dfsg-1 \|\| >=0 <3.4.5+dfsg-1	3.4.5+dfsg-1
rpm rhel10	grafana	-	-
rpm rhel10	cockpit-image-builder	-	-
rpm rhel9	grafana	-	-
rpm rhel10	ceph	-	-
rpm rhel8	grafana	-	-
debian 12	node-dompurify	=2.4.1+dfsg+~2.4.0-1 \|\| =2.4.1+dfsg+~2.4.0-2 \|\| =2.4.1+dfsg+~2.4.0-2+deb12u1 \|\| =3.0.9+dfsg+~3.0.5-1 \|\| =3.1.6+dfsg+~3.0.5-1 \|\| =3.1.7+dfsg+~3.0.5-1 \|\| =3.1.7+dfsg+~3.0.5-2 \|\| =3.2.5+dfsg-1 \|\| =3.3.2+dfsg-1 \|\| =3.3.3+dfsg-1 \|\| =3.3.3+dfsg-2 \|\| =3.4.1+dfsg-1 \|\| =3.4.12+dfsg-1 \|\| =3.4.13+dfsg-1 \|\| =3.4.13+dfsg-2 \|\| =3.4.16+dfsg-1 \|\| =3.4.2+dfsg-1 \|\| =3.4.5+dfsg-1	-

Aliases

1. CVE-2026-659042. NVD-2026-659043. OSV-DEBIAN-2026-659044. OSV-2026-659045. SECURITY-TRACKER-CVE-2026-65904

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