TI-2026-46944 Aliases CVE-2026-65904

DOMPurify through 3.3.3 Cross-Site Scripting via IN_PLACE mode

MEDIUM 45CWE-754Published 2026-07-23 · Updated 2026-07-24

Key facts

Attack vector: Network
Privileges required: None
User interaction: Passive
Attack complexity: High
Attack requirements: Present
Impact type: —
Confidentiality · integrity · availability: None · None · None
Fix status: Partial Red Hat: 1 fixed, 28 without a fix

Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.00266 18th percentileScored 2026-11-07

Public exploit Yes 1 exploit referenceTagged by NVD

Fix Partial Red Hat: 1 advisoryRed Hat: 1 fixed, 28 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
cure53	DOMPurify	up to 3.3.3	—	No fix listed	CNA

DOMPurify Vendorcure53 Affected up to 3.3.3 Fixed in — No fix listed CNA

CPE configurations NVD · 1

CPE	Versions	Role	Vendor
cpe:2.3:a:cure53:dompurify::::::::	before 3.4.4	Vulnerable	cure53

cpe:2.3:a:cure53:dompurify:*:*:*:*:*:*:*:* Versions before 3.4.4 Vulnerable ·cure53

Remediation

Red Hat 1 advisory

RHSA-2026:54517 Released 2026-08-13 · Red Hat rating Important
Red Hat Hardened Images RPMs Security Update
- Red Hat Hardened Images grafana13.1-13.1.3-0.1.1.hum1@aarch64, grafana13.1-13.1.3-0.1.1.hum1@src, grafana13.1-13.1.3-0.1.1.hum1@x86_64

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
Migration Toolkit for Virtualization	Affected	No fix yet: Fix deferred
Multicluster Engine for Kubernetes	Affected	No fix yet: Fix deferred
Node HealthCheck Operator	Affected	No fix yet: Fix deferred
OpenShift Lightspeed	Affected	No fix yet: Fix deferred
OpenShift Service Mesh 3	Affected	No fix yet: Fix deferred
Red Hat 3scale API Management Platform 2	Affected	No fix yet: Fix deferred
Red Hat AMQ Broker 7	Affected	No fix yet: Fix deferred
Red Hat Advanced Cluster Management for Kubernetes 2	Affected	No fix yet: Fix deferred
Red Hat Advanced Cluster Security 4	Affected	No fix yet: Fix deferred
Red Hat Ansible Automation Platform 2	Affected	No fix yet: Fix deferred
Red Hat Build of Podman Desktop	Affected	No fix yet: Fix deferred
Red Hat Ceph Storage 6	Affected	No fix yet: Fix deferred
Red Hat Ceph Storage 8	Affected	No fix yet: Fix deferred
Red Hat Ceph Storage 9	Affected	No fix yet: Fix deferred
Red Hat Data Grid 8	Affected	No fix yet: Fix deferred
Red Hat Developer Hub 1	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 10	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 8	Affected	No fix yet: Fix deferred
Red Hat Enterprise Linux 9	Affected	No fix yet: Fix deferred
Red Hat OpenShift Container Platform 4	Affected	No fix yet: Fix deferred
Red Hat OpenShift Container Platform 5	Affected	No fix yet: Fix deferred
Red Hat OpenShift Dev Spaces	Affected	No fix yet: Fix deferred
Red Hat OpenShift GitOps	Affected	No fix yet: Fix deferred
Red Hat OpenShift Virtualization 4	Affected	No fix yet: Fix deferred
Red Hat Openshift Data Foundation 4	Affected	No fix yet: Fix deferred
Red Hat build of Apache Camel for Spring Boot 4	Affected	No fix yet: Fix deferred
Red Hat build of Apicurio Registry 3	Affected	No fix yet: Fix deferred
Self-service automation portal 2	Affected	No fix yet: Fix deferred
Red Hat Hardened Images	Fixed	RHSA-2026:54517

Not affected: 5 products

Ansible Automation Orchestrator 2026
Red Hat Ansible Automation Platform 2
Red Hat Enterprise Linux 10
Red Hat Hardened Images
Red Hat OpenShift AI (RHOAI)

Timeline

2026-10-02 Threatist record created from CVE-2026-65904
2026-10-27 Affected versions changed · Red Hat
2026-11-06 Affected versions changed · Red Hat

References

Exploit 1

GitHub Security Advisory (GHSA-4w3q-35jp-p934)

TI-2026-34986 DOMPurify XSS via `selectedcontent` re-clone CVSS 3.1HIGH 8.2
TI-2026-36811 DOMPurify IN_PLACE Sanitization Bypass via Attached Shadow Root Inside <template>.content CVSS 4.0MEDIUM 6.3
TI-2026-36614 DOMPurify: IN_PLACE mode preserves attributes of a clobbered root element, allowing XSS via attacker-controlled root DOM CVSS 3.1MEDIUM 6.1
TI-2026-36613 DOMPurify: Cross-realm IN_PLACE sanitization leaves executable markup intact via realm-bound `instanceof` checks CVSS 3.1MEDIUM 6.1
TI-2026-29849 DOMPurify: FORBID_TAGS bypassed by function-based ADD_TAGS predicate (asymmetry with FORBID_ATTR fix) CVSS 4.0MEDIUM 6.0
TI-2025-19705 Cross-site scripting in cure53 DOMPurify CVSS 3.1MEDIUM 6.1

See all 25 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences