CVE-2026-6388: Insufficient Granularity of Access Control in Red Hat Red Hat OpenShift GitOps
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.
AI Analysis
Technical Summary
The vulnerability arises from insufficient granularity of access control in the ArgoCD Image Updater within Red Hat OpenShift GitOps. An attacker who has permissions to create or modify ImageUpdater resources can exploit insufficient validation to perform unauthorized image updates across namespace boundaries in a multi-tenant environment. This flaw enables cross-namespace privilege escalation, compromising the integrity of applications by allowing unauthorized updates.
Potential Impact
Exploitation of this vulnerability allows an attacker with limited privileges to escalate their access across namespaces, triggering unauthorized image updates on applications belonging to other tenants. This compromises application integrity and could lead to further security issues due to unauthorized changes in application deployment.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory at https://access.redhat.com/security/cve/CVE-2026-6388 for current remediation guidance. No official fix or temporary workaround is currently documented. Until a fix is available, restrict permissions to create or modify ImageUpdater resources to trusted users only to reduce risk.
CVE-2026-6388: Insufficient Granularity of Access Control in Red Hat Red Hat OpenShift GitOps
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.
CVSS v3.1
Score 9.1critical
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability arises from insufficient granularity of access control in the ArgoCD Image Updater within Red Hat OpenShift GitOps. An attacker who has permissions to create or modify ImageUpdater resources can exploit insufficient validation to perform unauthorized image updates across namespace boundaries in a multi-tenant environment. This flaw enables cross-namespace privilege escalation, compromising the integrity of applications by allowing unauthorized updates.
Potential Impact
Exploitation of this vulnerability allows an attacker with limited privileges to escalate their access across namespaces, triggering unauthorized image updates on applications belonging to other tenants. This compromises application integrity and could lead to further security issues due to unauthorized changes in application deployment.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory at https://access.redhat.com/security/cve/CVE-2026-6388 for current remediation guidance. No official fix or temporary workaround is currently documented. Until a fix is available, restrict permissions to create or modify ImageUpdater resources to trusted users only to reduce risk.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-04-15T19:29:52.786Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-6388","vendor":"Red Hat"}]
Threat ID: 69e00aeb82d89c981f9f944b
Added to database: 04/15/2026, 22:02:19 UTC
Last enriched: 07/15/2026, 09:36:12 UTC
Last updated: 07/31/2026, 19:23:00 UTC
Views: 272
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