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CVE-2026-62861— TypeBot: Cross-tenant custom-domain removal via unbound `name` in handleDeleteCustomDomain

Quick assessment

Affected
baptisteArno typebot.io
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.

Typebot是Typebot公司开源的一款集成人工智能的智能客服对话系统。 Typebot 3.18.0之前版本存在授权问题漏洞，该漏洞源于handleDeleteCustomDomain.ts中的自定义域名删除处理程序在验证域名是否属于该工作区之前，根据客户端提供的workspaceId进行授权，并将客户端提供的域名发送到共享Vercel项目，导致已认证的非访客工作区成员可以删除其他工作区的公共自定义域名，并使该域名上的typebots不可用。

CVSS 6.4 · Medium EPSS 0.41% · P36

Affected Version Matrix 1

VendorProduct Version RangeStatus
baptisteArno typebot.io < 3.18.0 affected
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I. Basic Information for CVE-2026-62861

Vulnerability Information
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Vulnerability Title
TypeBot: Cross-tenant custom-domain removal via unbound `name` in handleDeleteCustomDomain
Source: CVE Program / CVE List V5
Vulnerability Description
TypeBot is a chatbot builder tool. Prior to 3.18.0, any authenticated non-guest workspace member can remove another workspace's public custom domain and make typebots on that domain unavailable. The custom-domain delete handler in handleDeleteCustomDomain.ts authorizes a caller against a client-supplied workspaceId but sends the client-supplied domain name to the shared Vercel project before verifying that the domain belongs to that workspace. This issue is fixed in version 3.18.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:H
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5
Vulnerability Title
Typebot 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Typebot是Typebot公司开源的一款集成人工智能的智能客服对话系统。 Typebot 3.18.0之前版本存在授权问题漏洞，该漏洞源于handleDeleteCustomDomain.ts中的自定义域名删除处理程序在验证域名是否属于该工作区之前，根据客户端提供的workspaceId进行授权，并将客户端提供的域名发送到共享Vercel项目，导致已认证的非访客工作区成员可以删除其他工作区的公共自定义域名，并使该域名上的typebots不可用。
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
baptisteArno typebot.io < 3.18.0 -

II. Public POCs for CVE-2026-62861

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III. Intelligence Information for CVE-2026-62861

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Patches & Fixes for CVE-2026-62861 (1)

Vendor Advisories for CVE-2026-62861 (1)

Vendor Pages for CVE-2026-62861 (1)

Same Patch Batch · baptisteArno · 2026-08-25 · 3 CVEs total

CVE-2026-62862 9.1 CRITICAL TypeBot: Account takeover via brute-forceable 6-digit magic-link code
CVE-2026-62865 8.7 HIGH TypeBot: Arbitrary server file read via Send Email block attachment path

IV. Related Vulnerabilities

Same product: typebot.io
Same vendor: baptisteArno
Same weakness: CWE-639