Budibase: Builder-to-Admin Privilege Escalation via onboardUsers Endpoint Without SMTP Configuration_CVE-2026-45716

{
    "lastseen": "",
    "description": "Budibase is an open-source low-code platform. Prior to 3.38.1, the POST /api/global/users/onboard endpoint is protected by workspaceBuilderOrAdmin middleware, allowing any user with builder permissions to access it. When SMTP email is not configured (the default for self-hosted Budibase instances), this endpoint bypasses the admin-restricted invite flow and directly creates users via bulkCreate, accepting arbitrary admin and builder role assignments from the request body. A builder-level user can create a new global admin account and receive the generated password in the response, achieving full privilege escalation. This vulnerability is fixed in 3.38.1.",
    "published": "2026-05-27T17:09:43.383Z",
    "modified": "2026-05-27T17:09:43.383Z",
    "type": "cve",
    "title": "Budibase: Builder-to-Admin Privilege Escalation via onboardUsers Endpoint Without SMTP Configuration",
    "source": "GitHub_M",
    "references": "https://github.com/Budibase/budibase/security/advisories/GHSA-c54j-xp92-wh28\nhttps://github.com/Budibase/budibase/releases/tag/3.38.1",
    "id": "CVE-2026-45716",
    "bulletinFamily": "",
    "cwe": [
        "CWE-269"
    ],
    "cvelist": null,
    "sourceData": "Budibase budibase < 3.38.1",
    "sourceHref": "",
    "cvss": {
        "score": 8.8,
        "severity": "HIGH",
        "vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/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": "budibase",
    "version": "< 3.38.1",
    "vendor": "Budibase",
    "ai_description": "Privilege escalation vulnerability in Budibase via onboardUsers endpoint without SMTP configuration",
    "ai_severity": "High",
    "ai_vendor": "Budibase",
    "ai_product": "Budibase",
    "ai_version": "< 3.38.1",
    "ai_score": 8.8
}