Dashboard / CVE-2026-65904

CVE-2026-65904

LOW
INFO Priority: 0.01 BB Relevance: 45/100
Published: 2026-07-23 Modified: 2026-10-24 First seen: 2026-10-29 Status: active

Attack Surface

Network No Auth

CVSS Vector Breakdown

AV: Network
AC: High
PR: None
UI: Passive
S: X
AT: Present
VC: None
VI: None
VA: None

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.

Weakness Classification (1)

Affected Software (1)

VendorProductVersion
cure53 dompurify < 3.4.4

References & Advisories (2)

Bug Bounty Relevance

45 / 100
✓ Network accessible
✓ No authentication

CVSS Score

2.3 / 10.0 v4.0
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS — Exploitation Probability

0.27%
Raw Score 0.002660
Percentile 18.5%
Date 2026-10-29

EPSS Trend

2026-10-29
0.00266
2026-10-28
0.00266

Intelligence Sources

nvd ref →

External Links