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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.

在 Budibase 3.41.3 之前的版本中，公共的用户创建和更新接口未能正确校验应用范围（app-scoped）的构建者（builder）角色分配，导致拥有应用范围内构建者权限的认证用户能够将构建者权限授予不相关的应用。攻击者可以通过向用户更新 API 提交精心构造的请求，并包含 字段，从而提升权限，并获得同一租户下其他应用的未授权构建者访问权限。

CVSS 8.1 · High

Possible ATT&CK Techniques 1 AI

T1100
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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

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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