High [CVE-2026-75838] Cross-Site Scripting via IN_PLACE sanitization
This high-severity Red Hat Linux advisory covers CVE-2026-75838 affecting Migration Toolkit for Virtualization, Multicluster Engine for Kubernetes, Node HealthCheck Operator.
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Summary
DOMPurify before 3.4.13 contains a cross-site scripting vulnerability in IN_PLACE sanitization where element-removal hooks fail to neutralize detached subtrees. Attackers can supply HTML with event handlers on descendant elements that execute after sanitization completes, even though the returned root appears clean.
A flaw was found in DOMPurify. A remote attacker can exploit this by supplying specially crafted HTML with event handlers.
This allows the execution of malicious scripts even after the HTML appears to be sanitized, leading to potential information disclosure or unauthorized actions. Red Hat severity: Important — CVSS 7.3 (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N).
Weakness: CWE-79.
Affected Red Hat products: Migration Toolkit for Virtualization; Multicluster Engine for Kubernetes; Node HealthCheck Operator; OpenShift Service Mesh 3; Red Hat 3scale API Management Platform 2; Red Hat Advanced Cluster Management for Kubernetes 2; Red Hat Advanced Cluster Security 4; Red Hat Ansible Automation Platform 2; Red Hat build of Apicurio Registry 3; Red Hat Build of Podman Desktop; Red Hat Ceph Storage 9; Red Hat Developer Hub; Red Hat OpenShift AI (RHOAI); Red Hat OpenShift Container Platform 4; Red Hat Openshift Data Foundation 4; Red Hat OpenShift Dev Spaces; Red Hat OpenShift GitOps; Red Hat OpenShift Virtualization 4; Self-service automation portal 2.
- < 3.4.13
Official advisory · high-confidence parse· fetched 54 minutes ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 54 minutes ago·verify at source
Mitigation
The source record does not include mitigation steps. That is not a statement that no fix exists — read the vendor advisory below for the authoritative guidance.
Official advisory · high-confidence parse· fetched 54 minutes ago·verify at source
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