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

Quick assessment

Affected
Red Hat Red Hat OpenShift GitOps
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Red Hat OpenShift GitOps是美国红帽（Red Hat）公司的一个自动化部署服务。 Red Hat OpenShift GitOps存在安全漏洞，该漏洞源于验证不足，可能导致攻击者绕过命名空间边界，触发跨命名空间权限提升，影响应用程序完整性。

CVSS 9.1 · Critical EPSS 0.41% · P33

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
Red Hat Red Hat OpenShift GitOps any affected
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I. Basic Information for CVE-2026-6388

Vulnerability Information
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Vulnerability Title
Argocd-image-updater: argocd image updater: cross-namespace privilege escalation via insufficient namespace validation
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-1220
Source: CVE Program / CVE List V5
Vulnerability Title
Red Hat OpenShift GitOps 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Red Hat OpenShift GitOps是美国红帽（Red Hat）公司的一个自动化部署服务。 Red Hat OpenShift GitOps存在安全漏洞，该漏洞源于验证不足，可能导致攻击者绕过命名空间边界，触发跨命名空间权限提升，影响应用程序完整性。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

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Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat OpenShift GitOps - cpe:/a:redhat:openshift_gitops:1

II. Public POCs for CVE-2026-6388

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III. Intelligence Information for CVE-2026-6388

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Vendor Advisories for CVE-2026-6388 (1)

Same Patch Batch · Red Hat · 2026-04-15 · 10 CVEs total

CVE-2026-6384 7.3 HIGH Gimp: gimp: arbitrary code execution or denial of service via buffer overflow in gif image
CVE-2026-6385 6.5 MEDIUM Ffmpeg: ffmpeg: denial of service and potential arbitrary code execution via signed intege
CVE-2026-40919 6.1 MEDIUM Gimp: gimp: denial of service via specially crafted seattle filmworks file
CVE-2026-6245 5.5 MEDIUM Sssd: out-of-bounds read in the sssd
CVE-2026-40915 5.5 MEDIUM Gimp: gimp: heap buffer overflow due to integer overflow in fits image loader
CVE-2026-40918 5.5 MEDIUM Gimp: gimp: denial of service via crafted pvr image file
CVE-2026-6383 5.4 MEDIUM Kubevirt: kubevirt: unauthorized subresource access due to improper rbac evaluation
CVE-2026-40916 5.0 MEDIUM Gimp: gimp: denial of service due to stack buffer overflow in tim image loader
CVE-2026-40917 5.0 MEDIUM Gimp: gimp: application crashes or information disclosure via crafted icns image files

IV. Related Vulnerabilities

Same product: Red Hat OpenShift GitOps
Same vendor: Red Hat
Same weakness: CWE-1220

V. Comments for CVE-2026-6388

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