What is CVE-2026-6388?

CVE-2026-6388 is a critical-severity vulnerability in Red Hat Openshift Gitops, classified under CWE-1220. CVSS score: 9.1/10. Published 2026-04-15.

How severe is CVE-2026-6388?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Vulnerability in Red Hat Openshift Gitops

CVE-2026-6388

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 valida…

EPSS: 0.000 (10.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:L.

Affected products

Red Hat Openshift Gitops

Weakness classification (CWE)

CWE-1220

References

access.redhat.com/security/cve/CVE-2026-6388 (vdb-entry, x_refsource_REDHAT)
RHBZ#2458766 (issue-tracking, x_refsource_REDHAT)

Frequently asked questions

What is CVE-2026-6388?: CVE-2026-6388 is a critical-severity vulnerability in Red Hat Openshift Gitops, classified under CWE-1220. CVSS score: 9.1/10. Published 2026-04-15.
How severe is CVE-2026-6388?: Critical severity. CVSS v3 base score is 9.1 out of 10.