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CVE-2026-48153— Budibase: SSRF via OAuth2 token endpoint URL reaches internal hosts and cloud metadata

Quick assessment

Affected
Budibase budibase
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Budibase是英国Budibase开源的一个用于在几分钟内创建内部应用程序、工作流和管理面板的低代码平台。 Budibase 3.39.0之前版本存在安全漏洞，该漏洞源于OAuth2 SDK中的fetchToken使用原始node-fetch且跳过黑名单检查，可能导致服务端请求伪造。

CVSS 8.5 · High EPSS 0.18% · P7

Affected Version Matrix 1

VendorProduct Version RangeStatus
Budibase budibase < 3.39.0 affected
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I. Basic Information for CVE-2026-48153

Vulnerability Information
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Vulnerability Title
Budibase: SSRF via OAuth2 token endpoint URL reaches internal hosts and cloud metadata
Source: CVE Program / CVE List V5
Vulnerability Description
Budibase is an open-source low-code platform. Prior to 3.39.0, fetchToken in the OAuth2 SDK makes a POST to a builder-supplied URL with plain node-fetch, skipping the blacklist.isBlacklisted check that every other outbound fetch path in the codebase uses. The Joi schema for the OAuth2 URL has no scheme or host restriction. This vulnerability is fixed in 3.39.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
Budibase 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Budibase是英国Budibase开源的一个用于在几分钟内创建内部应用程序、工作流和管理面板的低代码平台。 Budibase 3.39.0之前版本存在安全漏洞，该漏洞源于OAuth2 SDK中的fetchToken使用原始node-fetch且跳过黑名单检查，可能导致服务端请求伪造。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Budibase budibase < 3.39.0 -

II. Public POCs for CVE-2026-48153

# POC Description Source Link Shenlong Link
AI-Generated POC Verified env Premium
Qwen3.6-35B-A3B · 7268 chars
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Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
Full executable POC code
Exploit chain & mitigation
POC zip download
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III. Intelligence Information for CVE-2026-48153

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Vendor Advisories for CVE-2026-48153 (1)

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-2026-45716 8.8 HIGH Budibase: Builder-to-Admin Privilege Escalation via onboardUsers Endpoint Without SMTP Con
CVE-2026-45717 8.8 HIGH Budibase: `PUT /api/datasources/:datasourceId` is protected only by `TABLE/READ` permissio
CVE-2026-48152 8.1 HIGH Budibase: Basic app users can exfiltrate stored REST datasource auth by rewriting datasour
CVE-2026-48149 8.1 HIGH Budibase: Stored XSS in Text component: BASIC users execute JS in admin session via Markdo
CVE-2026-45715 7.7 HIGH Budibase: SSRF Bypass via HTTP Redirect in REST Datasource Integration
CVE-2026-46427 7.7 HIGH Budibase: Snowflake private key returned unmasked from datasource API to BASIC users
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-2026-45061 7.7 HIGH Budibase: SSRF via trivial `.tar.gz` substring bypass in Plugin URL upload (`/api/plugin`)
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
Same vendor: Budibase
Same weakness: CWE-918

V. Comments for CVE-2026-48153

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