CVE-2026-62861

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

6.4 Medium

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.

Attack profile

How easy it is to exploit

Attack vector: Network
Complexity: Low
Privileges needed: Low
User interaction: None

What an attacker can affect

Confidentiality: None
Integrity: None
Availability: None

Exploit likelihood

0.41%Unchanged since Aug 26, 2026

What each source reports

CVE List Score used 6.4

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

Record: CVE-2026-62861
CVSS 4.0: 6.4 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:H
Weakness: CWE-639, CWE-862
Updated: 2026-11-02

EUVDEUVD-2026-66126 6.4

Record: EUVD-2026-66126
CVSS 4.0: 6.4 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:H
Updated: 2026-11-02

NVD 6.4

Record: CVE-2026-62861
CVSS 4.0: 6.4 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness: CWE-639, CWE-862
Updated: 2026-11-02

OSV 6.4

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

Record: CVE-2026-62861
CVSS 4.0: 6.4 MediumCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:H/SA:H
Weakness: CWE-639, CWE-862
Updated: 2026-11-02

Affected products

baptistearno typebot.io

History

History
Recorded	Changed	Sources
Nov 2, 2026	first indexed	CVE List, EUVD, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-62861 is a medium vulnerability (CVSS 6.4) in Baptistearno Typebot.io, published August 25, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.41%, the 35th percentile. No source names a fixed version.