CVE-2026-6388: Insufficient Granularity of Access Control in Red Hat Red Hat OpenShift GitOps
CVE-2026-6388 is a critical vulnerability in Red Hat OpenShift GitOps, specifically in the ArgoCD Image Updater component. It allows an attacker with permissions to create or modify ImageUpdater resources in a multi-tenant environment to bypass namespace boundaries. This flaw enables unauthorized image updates on applications managed by other tenants, resulting in cross-namespace privilege escalation and impacting application integrity. The vulnerability has a CVSS score of 9. 1, indicating high severity. No official patch or remediation guidance is currently provided by Red Hat. There are no known exploits in the wild at this time.
AI Analysis
Technical Summary
This vulnerability arises from insufficient validation in the ArgoCD Image Updater within Red Hat OpenShift GitOps. An attacker who can create or modify ImageUpdater resources can exploit this to perform unauthorized image updates across namespaces in a multi-tenant environment. This bypass of namespace boundaries leads to privilege escalation and compromises the integrity of applications managed by other tenants. The CVSS 3.1 base score is 9.1, reflecting network attack vector, low attack complexity, required privileges, no user interaction, scope change, and high impact on integrity with some impact on availability.
Potential Impact
The vulnerability allows cross-namespace privilege escalation by enabling unauthorized image updates on applications belonging to other tenants. This compromises application integrity and could potentially disrupt application availability. The critical CVSS score (9.1) reflects the significant risk posed by this flaw in multi-tenant OpenShift GitOps environments.
Mitigation Recommendations
Patch status is not yet confirmed — check the Red Hat advisory at https://access.redhat.com/security/cve/CVE-2026-6388 for current remediation guidance. Until an official fix is available, restrict permissions to create or modify ImageUpdater resources to trusted users only and monitor for any unauthorized changes. Follow vendor updates closely for any forthcoming patches or mitigations.
CVE-2026-6388: Insufficient Granularity of Access Control in Red Hat Red Hat OpenShift GitOps
Description
CVE-2026-6388 is a critical vulnerability in Red Hat OpenShift GitOps, specifically in the ArgoCD Image Updater component. It allows an attacker with permissions to create or modify ImageUpdater resources in a multi-tenant environment to bypass namespace boundaries. This flaw enables unauthorized image updates on applications managed by other tenants, resulting in cross-namespace privilege escalation and impacting application integrity. The vulnerability has a CVSS score of 9. 1, indicating high severity. No official patch or remediation guidance is currently provided by Red Hat. There are no known exploits in the wild at this time.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability arises from insufficient validation in the ArgoCD Image Updater within Red Hat OpenShift GitOps. An attacker who can create or modify ImageUpdater resources can exploit this to perform unauthorized image updates across namespaces in a multi-tenant environment. This bypass of namespace boundaries leads to privilege escalation and compromises the integrity of applications managed by other tenants. The CVSS 3.1 base score is 9.1, reflecting network attack vector, low attack complexity, required privileges, no user interaction, scope change, and high impact on integrity with some impact on availability.
Potential Impact
The vulnerability allows cross-namespace privilege escalation by enabling unauthorized image updates on applications belonging to other tenants. This compromises application integrity and could potentially disrupt application availability. The critical CVSS score (9.1) reflects the significant risk posed by this flaw in multi-tenant OpenShift GitOps environments.
Mitigation Recommendations
Patch status is not yet confirmed — check the Red Hat advisory at https://access.redhat.com/security/cve/CVE-2026-6388 for current remediation guidance. Until an official fix is available, restrict permissions to create or modify ImageUpdater resources to trusted users only and monitor for any unauthorized changes. Follow vendor updates closely for any forthcoming patches or mitigations.
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: 4/15/2026, 10:02:19 PM
Last enriched: 4/15/2026, 10:16:51 PM
Last updated: 4/15/2026, 11:03:39 PM
Views: 4
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