CVE-2026-6388

CRITICAL

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.

CVSS v3.1 Score

9.1
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:L
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality
LOW
Integrity
HIGH
Availability
LOW
Published: 4/15/2026Modified: 4/17/2026

Related Intelligence (1)

CRITICALVulnerability

NVD CRITICAL: CVE-2026-6388 — A flaw was found in ArgoCD Image Updater. This vulnerability allows an attacker,...

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

CVE-2026-6388
NIST NVD

References (2)

https://access.redhat.com/security/cve/CVE-2026-6388https://bugzilla.redhat.com/show_bug.cgi?id=2458766