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CVE-2026-82240— Budibase before 3.41.3 Privilege Escalation via User Update API

Quick assessment

Affected
budibase server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
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公司开源的一个低代码应用开发平台。 Budibase 3.41.3之前版本存在授权问题漏洞，该漏洞源于对公共用户创建和更新端点中的应用范围构建器角色分配验证不当，可能导致经过身份验证的应用范围构建器为无关应用授予构建器访问权限，攻击者可利用builder.apps字段提交特制请求提升权限并获取其他应用的未授权构建器访问权限。

CVSS 8.1 · High EPSS 0.36% · P29

Possible ATT&CK Techniques 1 AI

T1100

Affected Version Matrix 2

VendorProduct Version RangeStatus
budibase server < 3.41.3 affected
3.41.3 unaffected
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I. Basic Information for CVE-2026-82240

Vulnerability Information
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Vulnerability Title
Budibase before 3.41.3 Privilege Escalation via User Update API
Source: CVE Program / CVE List V5
Vulnerability Description
Budibase before 3.41.3 fails to validate app-scoped builder role assignments in the public user create and update endpoints, allowing an authenticated app-scoped builder to grant builder access to unrelated apps. Attackers can submit crafted requests to the user update API with builder.apps fields to escalate privileges and gain unauthorized builder access to other applications in the same tenant.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Budibase 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Budibase是英国Budibase公司开源的一个低代码应用开发平台。 Budibase 3.41.3之前版本存在授权问题漏洞，该漏洞源于对公共用户创建和更新端点中的应用范围构建器角色分配验证不当，可能导致经过身份验证的应用范围构建器为无关应用授予构建器访问权限，攻击者可利用builder.apps字段提交特制请求提升权限并获取其他应用的未授权构建器访问权限。
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 server 0 ~ 3.41.3 -

II. Public POCs for CVE-2026-82240

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III. Intelligence Information for CVE-2026-82240

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Vendor Advisories for CVE-2026-82240 (2)

Same Patch Batch · budibase · 2026-08-28 · 8 CVEs total

CVE-2026-82244 9.1 CRITICAL Budibase before 3.41.3 Remote Code Execution via Plugin eval()
CVE-2026-82245 8.1 HIGH Budibase before 3.41.3 Missing Authorization License Management
CVE-2026-82239 8.1 HIGH Budibase before 3.41.3 Authorization Bypass via datasources/query
CVE-2026-82242 7.7 HIGH Budibase before 3.41.3 Cross-Application Resource Injection via Missing Authorization
CVE-2026-82243 7.6 HIGH Budibase Server before 3.41.3 SSRF with Credential Leakage
CVE-2026-82246 7.1 HIGH Budibase Server before 3.41.3 SSRF via Query Import
CVE-2026-82241 7.1 HIGH Budibase backend-core SSRF via incomplete default blacklist

IV. Related Vulnerabilities

Same product: server
Same vendor: budibase
Same weakness: CWE-862

V. Comments for CVE-2026-82240

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