CVE-2026-62861

TypeBot: Cross-tenant custom-domain removal via unbound `name` in handleDeleteCustomDomain

State: Published
Severity: 6.4 Medium
Published: Aug 25, 2026
Updated: Aug 27, 2026
Reserved: Jul 14, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	6.4 Medium	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	GitHub_M

Weaknesses

CWE-639 Authorization Bypass Through User-Controlled Key
CWE-862 Missing Authorization

Affected Products

Product	Versions
typebot.iobaptisteArno	< 3.18.0Affected

References

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