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OpenAdvisories
Medium · 6.4 CVE-2026-62861 EUVD-2026-66126

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

Published Aug 25, 2026 · Updated Aug 27, 2026 · Assigned by GitHub_M

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.

Affected products

VendorProductAffectedFixed
baptisteArno typebot.io < 3.18.0 —

References