CVE-2026-62861 TypeBot: Cross-tenant custom-domain removal via unbound `name` in handleDeleteCustomDomain
Authenticated users can remove other workspaces' custom domains by bypassing ownership checks, causing service disruption for affected tenants.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-62861?
CVE-2026-62861 is a medium-severity missing authorization vulnerability in baptisteArno typebot.io, published on 25 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Which versions are affected by CVE-2026-62861?
How do I fix CVE-2026-62861?
No fix has been published for CVE-2026-62861 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-62861 being exploited?
There is no known exploitation of CVE-2026-62861 in the wild and no public exploit code.
Sources
Also known as GHSA-7h82-p425-wpmg.