vCluster Platform: Stored XSS can lead to privilege escalation_CVE-2026-42457

{
    "lastseen": "",
    "description": "vCluster Platform provides a Kubernetes platform for managing virtual clusters, multi-tenancy, and cluster sharing. Prior to 4.4.3, 4.5.5, 4.6.2, 4.7.1, and 4.8.0, there is a Stored XSS attack vulnerability via the name field of a templateRef. This can lead to the execution of arbitrary external scripts within the platform's browser context. In the worst case, a malicious user could potentially create a new Global-Admin user, bypassing other security restrictions. The attacker needs the ability to create namespaces. This vulnerability is fixed in 4.4.3, 4.5.5, 4.6.2, 4.7.1, and 4.8.0.",
    "published": "2026-05-14T14:48:05.096Z",
    "modified": "2026-05-14T14:48:05.096Z",
    "type": "cve",
    "title": "vCluster Platform: Stored XSS can lead to privilege escalation",
    "source": "GitHub_M",
    "references": "https://github.com/loft-sh/loft/security/advisories/GHSA-x7cq-v3h6-426c",
    "id": "CVE-2026-42457",
    "bulletinFamily": "",
    "cwe": [
        "CWE-79"
    ],
    "cvelist": null,
    "sourceData": "loft-sh loft < 4.4.3\nloft-sh loft >=4.5.0-alpha.0 , < 4.5.5\nloft-sh loft >= 4.6.0-alpha.1, < 4.6.2\nloft-sh loft >= 4.7.0-alpha.0, < 4.7.1",
    "sourceHref": "",
    "cvss": {
        "score": 9,
        "severity": "CRITICAL",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H",
        "version": "3.1"
    },
    "cvss2": [],
    "cvss3": {
        "version": "",
        "vectorString": "",
        "baseScore": 0,
        "baseSeverity": "",
        "attackVector": "",
        "attackComplexity": "",
        "privilegesRequired": "",
        "userInteraction": "",
        "scope": "",
        "confidentialityImpact": "",
        "integrityImpact": "",
        "availabilityImpact": "",
        "cvssV3": {
            "version": "",
            "vectorString": "",
            "baseScore": 0,
            "baseSeverity": "",
            "attackVector": "",
            "attackComplexity": "",
            "privilegesRequired": "",
            "userInteraction": "",
            "scope": "",
            "confidentialityImpact": "",
            "integrityImpact": "",
            "availabilityImpact": ""
        }
    },
    "href": "",
    "category_name": "CVE",
    "post_link": "",
    "product": "loft",
    "version": "< 4.4.3",
    "vendor": "loft-sh",
    "ai_description": "",
    "ai_severity": "",
    "ai_vendor": "",
    "ai_product": "",
    "ai_version": "",
    "ai_score": 0
}