CVE-2026-39966 Details
Description
TypeBot is a chatbot builder tool. In versions 3.15.2, the getLinkedTypebots API endpoint returns full bot definitions to any authenticated user who references a target bot ID in a Typebot Link block, regardless of workspace ownership, leading to IDOR. The authorization check uses Array.filter() with an async callback — since filter() is synchronous, the callback always returns a truthy Promise, so the access control predicate is never actually evaluated. Any authenticated Typebot user can read the full definition of any other workspace's private bots, including: all conversation blocks and logic flow, variable values embedded in the bot (credentials, API keys, PII), webhook URLs and integration configurations. This issue has been fixed in version 3.16.0.
An authorization bypass vulnerability has been identified in TypeBot versions through 3.15.2. The issue arises in the getLinkedTypebots API endpoint, which returns complete bot definitions to any authenticated user referencing a target bot ID in a Typebot Link block, regardless of workspace ownership. The vulnerability is caused by the authorization check using Array.filter() with an async callback. Since filter() operates synchronously, the callback always returns a truthy Promise, preventing the access control predicate from being properly evaluated. As a result, any authenticated TypeBot user can access the full definitions of private bots from other workspaces, including sensitive information such as variable values (credentials, API keys, PII), conversation blocks, logic flows, webhook URLs, and integration configurations.
Users can update to TypeBot version 3.16.0 or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed May 22, 2026CISA-ADP
Assessed May 22, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/baptisteArno/typebot.io/security/advisories/GHSA-3fr5-999r-84qj | CISA-ADP | AdvisoryRemedyVendor |
| https://github.com/baptisteArno/typebot.io/commit/b9530a089b43bfa6e79e3ff9cbfab921ce832f45 | [email protected] | Source CodeVendor |
| https://github.com/baptisteArno/typebot.io/releases/tag/v3.16.0 | [email protected] | Release NotesVendor |
| https://github.com/baptisteArno/typebot.io/security/advisories/GHSA-3fr5-999r-84qj | [email protected] | AdvisoryRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-863 | Incorrect Authorization | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Typebot | <= 3.15.2 (semver) |
CPE
Remediation
| |
Change History
5 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jul 23, 2026 | CVE Translated | [email protected] |
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| May 22, 2026 | New CVE Received | [email protected] |
| May 22, 2026 | CVE Modified | CISA-ADP |