CVE-2026-6388 CRITICAL

CVE-2026-6388: Argocd-image-updater: argocd image updater: cross-namespace privilege escalation via insufficient namespace validation

Vendor Red Hat
Product Red Hat OpenShift GitOps
Weakness CWE-1220
Published April 15, 2026
Last update June 30, 2026

CVSS base score

9.1/10
Attack vector Network
Attack complexity Low
Privileges required Low
User interaction None
Confidentiality Low
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:L

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

April 15, 2026 CVE published
June 30, 2026 Record updated