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Vulnerabilities CVE-2026-6388

CVE-2026-6388

Critical
Open
TLP:CLEAR

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

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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.

Details

CVSS Score
9.1
EPSS Score
0.36%

28.5th percentile

CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:L
Confidence
90%
Published
Apr 15, 2026
Last Modified
Jul 15, 2026
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