What’s Vulnerable › Vulnerabilities

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

• Severity: medium (CVSS 6.4 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-25 · updated 2026-09-09
• Weakness: CWE-639

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

• baptisteArno typebot.io: before 3.18.0

References

• https://github.com/baptisteArno/typebot.io/commit/06575dfcd461ba76071012869d4b1f4046f9a6b8
• https://github.com/baptisteArno/typebot.io/releases/tag/v3.18.0
• https://github.com/baptisteArno/typebot.io/security/advisories/GHSA-7h82-p425-wpmg

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