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CVE-2026-39966— TypeBot: Async filter() bypasses authorization, allowing IDOR in getLinkedTypebots and leaking cross-workspace bot definitions

Quick assessment

Affected
baptisteArno typebot.io
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Typebot是Baptiste Arnaud个人开发者的一个开源聊天机器人构建器。 Typebot 3.15.2版本存在安全漏洞，该漏洞源于getLinkedTypebots API端点使用带有异步回调的Array.filter()，导致授权检查始终返回真值Promise，可能导致不安全的直接对象引用。以下版本受到影响：3.15.2版本。

CVSS 6.5 · Medium EPSS 0.26% · P17

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 1

VendorProduct Version RangeStatus
baptisteArno typebot.io < 3.16.0 affected
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I. Basic Information for CVE-2026-39966

Vulnerability Information
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Vulnerability Title
TypeBot: Async filter() bypasses authorization, allowing IDOR in getLinkedTypebots and leaking cross-workspace bot definitions
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
Vulnerability Title
Typebot 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Typebot是Baptiste Arnaud个人开发者的一个开源聊天机器人构建器。 Typebot 3.15.2版本存在安全漏洞，该漏洞源于getLinkedTypebots API端点使用带有异步回调的Array.filter()，导致授权检查始终返回真值Promise，可能导致不安全的直接对象引用。以下版本受到影响：3.15.2版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
baptisteArno typebot.io < 3.16.0 -

II. Public POCs for CVE-2026-39966

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III. Intelligence Information for CVE-2026-39966

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Patches & Fixes for CVE-2026-39966 (1)

Vendor Advisories for CVE-2026-39966 (1)

Vendor Pages for CVE-2026-39966 (1)

Same Patch Batch · baptisteArno · 2026-05-22 · 11 CVEs total

CVE-2026-33712 10.0 CRITICAL TypeBot: Unauthenticated SSRF via isolated-vm fetch in preview chat endpoint bypasses SSRF
CVE-2026-28445 8.7 HIGH Typebot: Stored XSS via Rating Block Custom Icon Bypasses isUnsafe Sandbox in Builder Prev
CVE-2026-39965 7.7 HIGH TypeBot: SSRF via Open Redirect Bypass in HTTP Request and Code Blocks
CVE-2026-34207 7.6 HIGH TypeBot: SSRF Protection Bypass via DNS-Resolved Hostnames in Webhook / HTTP Request Valid
CVE-2026-39968 7.1 HIGH TypeBot: Cross-Workspace Credential Theft via Bot-Engine Preview Endpoint
CVE-2026-28444 6.5 MEDIUM Typebot: IDOR in Result Logs Endpoint Allows Cross-Workspace Data Disclosure
CVE-2026-39969 6.5 MEDIUM TypeBot: WhatsApp Webhook Endpoint Missing Signature Verification
CVE-2026-39964 5.4 MEDIUM TypeBot: Stored XSS via javascript: URI in text bubble links — bot author executes JS on v
CVE-2026-39967 3.1 LOW TypeBot: Cross-Typebot Result Data Access via Missing typebotId Filter
CVE-2026-39970 TypeBot: Stored Cross-Site Scripting (XSS) via SVG File Upload On Profile Picture Form

IV. Related Vulnerabilities

Same product: typebot.io
Same vendor: baptisteArno
Same weakness: CWE-863

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