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CVE-2026-54351— Budibase: Mass Assignment in Webhook Trigger Allows Cross-Workspace Automation Execution via appId Override

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公司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 3.39.9之前版本存在输入验证错误漏洞，该漏洞源于externalTrigger函数中存在大量赋值问题，导致webhook触发端点公开可访问并将完整HTTP请求体传递给自动化执行参数，攻击者可通过webhook POST体覆盖内部appId属性，从而在工作区上下文中执行攻击者定义的自动化，获得对受害者数据库的完全读写权限。

CVSS 8.2 · High EPSS 0.46% · P38

Affected Version Matrix 1

VendorProduct Version RangeStatus
Budibase budibase < 3.39.9 affected
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I. Basic Information for CVE-2026-54351

Vulnerability Information
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Vulnerability Title
Budibase: Mass Assignment in Webhook Trigger Allows Cross-Workspace Automation Execution via appId Override
Source: CVE Program / CVE List V5
Vulnerability Description
Budibase is an open-source low-code platform. Prior to 3.39.9, the webhook trigger endpoint in Budibase is publicly accessible and passes the full HTTP request body into automation execution parameters. A mass assignment vulnerability in externalTrigger() allows an attacker to overwrite the internal appId property by including it in the webhook POST body. When the automation is processed asynchronously (the default path for webhooks without a collect step), the worker executes the attacker-defined automation in the context of the victim's workspace, granting full read/write access to the victim's database. This vulnerability is fixed in 3.39.9.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
CWE-915
Source: CVE Program / CVE List V5
Vulnerability Title
Budibase 输入验证错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Budibase是英国Budibase公司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 3.39.9之前版本存在输入验证错误漏洞，该漏洞源于externalTrigger函数中存在大量赋值问题，导致webhook触发端点公开可访问并将完整HTTP请求体传递给自动化执行参数，攻击者可通过webhook POST体覆盖内部appId属性，从而在工作区上下文中执行攻击者定义的自动化，获得对受害者数据库的完全读写权限。
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 budibase < 3.39.9 -

II. Public POCs for CVE-2026-54351

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 9753 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
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III. Intelligence Information for CVE-2026-54351

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Vendor Advisories for CVE-2026-54351 (1)

Same Patch Batch · Budibase · 2026-06-26 · 7 CVEs total

CVE-2026-54350 10.0 CRITICAL Budibase: Anonymous NoSQL operator injection via published-app query templates
CVE-2026-54352 9.6 CRITICAL Budibase: Arbitrary file read by workspace-builder via PWA-zip symlink upload
CVE-2026-54353 8.5 HIGH Budibase: Potential SSRF DNS rebinding bypass in outbound fetch validation
CVE-2026-50136 7.4 HIGH Budibase: Unauthenticated S3 signed upload URL generation allows arbitrary writes with sto
CVE-2026-50132 7.3 HIGH Budibase: Chat Identity Link Hijacking via Missing Consent & CSRF — Account Impersonation
CVE-2026-50137 Budibase: POST /api/attachments/:datasourceId/url is unauthenticated and lets anonymous ca

IV. Related Vulnerabilities

Same product: budibase
Same vendor: Budibase
Same weakness: CWE-915

V. Comments for CVE-2026-54351

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