What’s Vulnerable › Vulnerabilities

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

• Severity: critical (CVSS 9.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-15 · updated 2026-10-26
• Weakness: CWE-1220

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.

Affected products

• Red Hat OpenShift GitOps: all versions

References

• https://access.redhat.com/security/cve/CVE-2026-6388
• https://bugzilla.redhat.com/show_bug.cgi?id=2458766
• https://access.redhat.com/security/cve/CVE-2026-6388
• https://bugzilla.redhat.com/show_bug.cgi?id=2458766
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-6388.json

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