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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.

PUBLISHED Reserved 2026-04-15 | Published 2026-04-15 | Updated 2026-04-16 | Assigner redhat




CRITICAL: 9.1CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:L

Problem types

Insufficient Granularity of Access Control

Product status

Default status
affected

Timeline

2026-04-15:Reported to Red Hat.
2026-04-15:Made public.

References

access.redhat.com/security/cve/CVE-2026-6388 vdb-entry

bugzilla.redhat.com/show_bug.cgi?id=2458766 (RHBZ#2458766) issue-tracking

cve.org (CVE-2026-6388)

nvd.nist.gov (CVE-2026-6388)

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