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CVE-2026-50132— Budibase: Chat Identity Link Hijacking via Missing Consent & CSRF — Account Impersonation in Budibase

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 3.39.0之前版本存在安全漏洞，该漏洞源于对/api/chat-links/:instance/:token/handoff端点缺乏身份验证、用户同意界面及跨站请求伪造保护，可能导致攻击者将外部聊天身份绑定到已认证用户账户。

CVSS 7.3 · High EPSS 0.19% · P8

Affected Version Matrix 1

VendorProduct Version RangeStatus
Budibase budibase < 3.39.0 affected
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I. Basic Information for CVE-2026-50132

Vulnerability Information
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Vulnerability Title
Budibase: Chat Identity Link Hijacking via Missing Consent & CSRF — Account Impersonation in Budibase
Source: CVE Program / CVE List V5
Vulnerability Description
Budibase is an open-source low-code platform. Prior to 3.39.0, `GET /api/chat-links/:instance/:token/handoff` is a public endpoint (no auth required) that performs a permanent, state-changing operation: it binds an external chat identity (Slack/Discord/MS Teams) to an authenticated Budibase user account, with no consent UI and no CSRF protection. The session token in the URL is created by the attacker (from their own /link slash command) and embeds the attacker's externalUserId. When an authenticated Budibase victim visits the URL, their account is silently and permanently linked to the attacker's Slack/Discord identity. The server responds with "Authentication succeeded." — no indication of what was linked. 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:R/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Budibase 权限许可和访问控制问题漏洞
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 3.39.0之前版本存在安全漏洞，该漏洞源于对/api/chat-links/:instance/:token/handoff端点缺乏身份验证、用户同意界面及跨站请求伪造保护，可能导致攻击者将外部聊天身份绑定到已认证用户账户。
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-2026-50132

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 6945 chars
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III. Intelligence Information for CVE-2026-50132

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Vendor Advisories for CVE-2026-50132 (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-2026-54351 8.2 HIGH Budibase: Mass Assignment in Webhook Trigger Allows Cross-Workspace Automation Execution v
CVE-2026-50136 7.4 HIGH Budibase: Unauthenticated S3 signed upload URL generation allows arbitrary writes with sto
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-284

V. Comments for CVE-2026-50132

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