ShellHub: Cross-tenant IDOR in `GET /api/namespaces/:tenant` via API Key bypasses membership check_CVE-2026-44426

{
    "lastseen": "",
    "description": "ShellHub is a centralized SSH gateway. Prior to 0.24.2, GET /api/namespaces/:tenant returns the full namespace object \u2014 including\nthe members list (user IDs, e-mails, roles), settings, and device counts \u2014 to any caller authenticated by an API Key, for any tenant, regardless of the API Key's own tenant scope. The handler conditionally skips the membership check when the user ID (X-ID) is absent, which is exactly the case for API Key authentication. This vulnerability is fixed in 0.24.2.",
    "published": "2026-05-13T21:06:06.222Z",
    "modified": "2026-05-13T21:06:06.222Z",
    "type": "cve",
    "title": "ShellHub: Cross-tenant IDOR in `GET /api/namespaces/:tenant` via API Key bypasses  membership check",
    "source": "GitHub_M",
    "references": "https://github.com/shellhub-io/shellhub/security/advisories/GHSA-vwx9-7qcf-gg7f",
    "id": "CVE-2026-44426",
    "bulletinFamily": "",
    "cwe": [
        "CWE-639"
    ],
    "cvelist": null,
    "sourceData": "shellhub-io shellhub < 0.24.2",
    "sourceHref": "",
    "cvss": {
        "score": 6.5,
        "severity": "MEDIUM",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N",
        "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": "shellhub",
    "version": "< 0.24.2",
    "vendor": "shellhub-io",
    "ai_description": "",
    "ai_severity": "",
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    "ai_product": "",
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    "ai_score": 0
}