CVE-2026-62861: CWE-639: Authorization Bypass Through User-Controlled Key in baptisteArno typebot.io
Description
CVE-2026-62861 is an authorization bypass vulnerability in typebot.io prior to version 3.18.0. Authenticated non-guest workspace members could remove another workspace's public custom domain, causing typebots on that domain to become unavailable. The flaw arises because the delete handler authorizes based on a client-supplied workspaceId but sends the client-supplied domain name to the shared Vercel project before verifying domain ownership. This issue is fixed in version 3.18.0.
CVSS v4.0
Score 6.4medium
Affected software
baptisteArno
typebot.io
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
TypeBot versions before 3.18.0 contain an authorization bypass vulnerability (CWE-639, CWE-862) in the custom domain deletion functionality. The handler for deleting custom domains authorizes the request using a client-supplied workspaceId but forwards the client-supplied domain name to the shared Vercel project without verifying that the domain belongs to the authorized workspace. This allows any authenticated non-guest workspace member to remove a public custom domain of another workspace, disrupting availability of typebots on that domain. The vulnerability is addressed in version 3.18.0.
Potential Impact
An authenticated non-guest user in any workspace can remove public custom domains belonging to other workspaces. This causes typebots hosted on those domains to become unavailable, potentially disrupting service for legitimate users relying on those domains. There is no indication of privilege escalation beyond domain removal or data disclosure.
Mitigation Recommendations
Upgrade to typebot.io version 3.18.0 or later, where this authorization bypass vulnerability is fixed. No other mitigation or temporary workaround is indicated.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-07-14T21:10:50.032Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a8e0eb7acd9273b49c03ed1
Added to database: 08/25/2026, 21:52:55 UTC
Last enriched: 09/10/2026, 12:40:32 UTC
Last updated: 10/10/2026, 18:48:21 UTC
Views: 79
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