Argocd-image-updater: argocd image updater: cross-namespace privilege escalation via insufficient namespace validation_CVE-2026-6388

{
    "lastseen": "",
    "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": "2026-04-15T21:34:07.022Z",
    "modified": "2026-04-15T21:34:07.022Z",
    "type": "cve",
    "title": "Argocd-image-updater: argocd image updater: cross-namespace privilege escalation via insufficient namespace validation",
    "source": "redhat",
    "references": "https://access.redhat.com/security/cve/CVE-2026-6388\nhttps://bugzilla.redhat.com/show_bug.cgi?id=2458766",
    "id": "CVE-2026-6388",
    "bulletinFamily": "",
    "cwe": [
        "CWE-1220"
    ],
    "cvelist": null,
    "sourceData": "",
    "sourceHref": "",
    "cvss": {
        "score": 9.1,
        "severity": "CRITICAL",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:H/A:L",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
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    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "Red Hat OpenShift GitOps",
    "version": "",
    "vendor": "Red Hat",
    "ai_description": "Cross-namespace privilege escalation via insufficient namespace validation in ArgoCD Image Updater",
    "ai_severity": "Critical",
    "ai_vendor": "Red Hat",
    "ai_product": "ArgoCD Image Updater",
    "ai_version": "",
    "ai_score": 9.1
}