CVE-2026-45716— Budibase: Builder-to-Admin Privilege Escalation via onboardUsers Endpoint Without SMTP Configuration
Possible ATT&CK Techniques 1AI
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I. Basic Information for CVE-2026-45716
Vulnerability Information
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Vulnerability Title
Budibase: Builder-to-Admin Privilege Escalation via onboardUsers Endpoint Without SMTP Configuration
Source: NVD (National Vulnerability Database)
Vulnerability 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.
Source: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: NVD (National Vulnerability Database)
Vulnerability Type
特权管理不恰当
Source: NVD (National Vulnerability Database)
Affected Products
II. Public POCs for CVE-2026-45716
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Vendor Advisories for CVE-2026-45716 (1)
Other References for CVE-2026-45716 (1)
- 🔗 Release 3.38.1 · Budibase/budibase · GitHubx_refsource_MISC
Same Patch Batch · Budibase · 2026-05-27 · 20 CVEs total
| CVE-2026-46425 | 9.9 CRITICAL | Budibase: SCIM endpoints lack role-based authorization, BASIC users CRUD tenant users |
| CVE-2026-48150 | 9.0 CRITICAL | Budibase: Workspace-scoped builder escalates to global admin via /api/public/v1/roles/assi |
| CVE-2026-45717 | 8.8 HIGH | Budibase: `PUT /api/datasources/:datasourceId` is protected only by `TABLE/READ` permissio |
| CVE-2026-48153 | 8.5 HIGH | Budibase: SSRF via OAuth2 token endpoint URL reaches internal hosts and cloud metadata |
| CVE-2026-48149 | 8.1 HIGH | Budibase: Stored XSS in Text component: BASIC users execute JS in admin session via Markdo |
| CVE-2026-48152 | 8.1 HIGH | Budibase: Basic app users can exfiltrate stored REST datasource auth by rewriting datasour |
| CVE-2026-46427 | 7.7 HIGH | Budibase: Snowflake private key returned unmasked from datasource API to BASIC users |
| CVE-2026-45061 | 7.7 HIGH | Budibase: SSRF via trivial `.tar.gz` substring bypass in Plugin URL upload (`/api/plugin`) |
| CVE-2026-48146 | 7.7 HIGH | Budibase: SSRF via OAuth2 Config Validation — Missing fetchWithBlacklist Protection |
| CVE-2026-45548 | 7.7 HIGH | Budibase: SSRF in AI Extract File Automation Step via Missing IP Blacklist Validation |
| CVE-2026-45715 | 7.7 HIGH | Budibase: SSRF Bypass via HTTP Redirect in REST Datasource Integration |
| CVE-2026-46426 | 7.6 HIGH | Budibase: Unrestricted Upload of File with Dangerous Type |
| CVE-2026-48151 | 7.5 HIGH | Budibase: Webhook schema endpoint authorization bypass allows unauthenticated mutation of |
| CVE-2026-48147 | 6.5 MEDIUM | Budibase: Unanchored Regex in `matchers.ts` Allows CSRF Bypass via Query String Injection |
| CVE-2026-45719 | 6.5 MEDIUM | Budibase: CouchDB Reduce Injection via Unsanitized Calculation Parameter in V1 Views API |
| CVE-2026-45718 | 5.4 MEDIUM | Budibase: Row Action Trigger Bypasses View Row Filter Security Boundary Allowing Action on |
| CVE-2026-46424 | 4.2 MEDIUM | Budibase: Missing Cache Invalidation on Public API Role Unassignment Allows Revoked Users |
| CVE-2026-48128 | Budibase: SSRF via User-Controlled queryId in Automation Execute Query Step | |
| CVE-2026-48148 | Budibase: Unvalidated VectorDB Host Parameter Enables SSRF |
IV. Related Vulnerabilities
Same product: budibase
- CVE-2026-48147
Budibase: Unanchored Regex in `matchers.ts` Allows CSRF Bypa - CVE-2026-48148
Budibase: Unvalidated VectorDB Host Parameter Enables SSRF - CVE-2026-45548
Budibase: SSRF in AI Extract File Automation Step via Missin - CVE-2026-45715
Budibase: SSRF Bypass via HTTP Redirect in REST Datasource I - CVE-2026-45717
Budibase: `PUT /api/datasources/:datasourceId` is protected
Same vendor: Budibase
- CVE-2026-48147
Budibase: Unanchored Regex in `matchers.ts` Allows CSRF Bypa - CVE-2026-48148
Budibase: Unvalidated VectorDB Host Parameter Enables SSRF - CVE-2026-45548
Budibase: SSRF in AI Extract File Automation Step via Missin - CVE-2026-45715
Budibase: SSRF Bypass via HTTP Redirect in REST Datasource I - CVE-2026-45717
Budibase: `PUT /api/datasources/:datasourceId` is protected
Same weakness: CWE-269
- CVE-2026-6226
Frontend Admin by DynamiApps <= 3.29.2 - Unauthenticated Pri - CVE-2026-46424
Budibase: Missing Cache Invalidation on Public API Role Unas - CVE-2026-8787
Firebase Support & Chat Management <= 3.1.1 - Missing Author - CVE-2026-9490
Acer Care Center creates a Named Pipe with a weak Security D - CVE-2026-6419
Wishlist Member <= 3.30.1 - Missing Authorization to Authent
V. Comments for CVE-2026-45716
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