CVE-2026-6388: Red Hat Openshift Gitops

Critical severity, CVSS 9.1. EPSS: 0.4% chance of exploitation in the next 30 days.

A flaw was found in ArgoCD Image Updater. This vulnerability allows an attacker, with permissions to create or modify an ImageUpdater resource in a multi-tenant environment, to bypass namespace boundaries. By exploiting insufficient validation, the attacker can trigger unauthorized image updates on applications managed by other tenants. This leads to cross-namespace privilege escalation, impacting application integrity through unauthorized application updates.

Affected products

• Red Hat Red Hat Openshift Gitops

Published 2026-04-15. Last modified 2026-07-15.