CVE-2026-66010
CVE-2026-66010: 1 tracked advisory record across Red Hat. Compare source-reported impact, fixes and remediation.
Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.
Vendor advisory comparison
Red Hat
1 advisory- Advisory severityMedium6.1
Medium [CVE-2026-66010] Cross-Site Scripting (XSS) via custom element attribute bypass
CVE-2026-66010Source published Source updated
DOMPurify before 3.4.12 fails to execute afterSanitizeElements hook for custom elements allowed via CUSTOM_ELEMENT_HANDLING.tagNameCheck, allowing attributes to bypass application security policies. Attackers can preserve sensitive attributes on custom elements that later re-inject them into innerHTML sinks, creating second-order XSS gadgets. A flaw was found in DOMPurify. These attributes can then be re-injected into web page content, leading to Cross-Site Scripting (XSS) attacks. An attacker could exploit this to execute malicious scripts in a user's browser, potentially leading to information disclosure or unauthorized actions. This Moderate-impact flaw in DOMPurify allows for Cross-Site Scripting (XSS) attacks by enabling the bypass of sanitization policies for custom elements. An…
- Affected products in this advisory
- Migration Toolkit for Virtualization
- Multicluster Engine for Kubernetes
- Node HealthCheck Operator
- OpenShift Lightspeed
14 more entries in the full advisory.
- Source-reported affected versions
- < 3.4.12
- Source-reported fixed versions
- No fixed-version detail extracted. This does not mean no fix exists.
- Mitigation guidance
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base, or stability.
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