CVE-2026-6388 — Argocd-image-updater: argocd image updater: cross-namespace privilege escalation via insufficient namespace validation
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 …
Published: 2026-04-15 · CVSS: 9.1 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7