CVE-2026-6388
CRITICAL
NVD
CVSS Score
9.1
Severity
CRITICAL
Published
Apr 15, 2026
Vendor
unknown
Description
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.