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

CVSS 6.5 · Medium

Possible ATT&CK Techniques 1AI

T1530 · Data from Cloud Storage

Affected Version Matrix 1

VendorProductVersion RangeStatus
baptisteArnotypebot.io< 3.16.0affected
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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: NVD (National Vulnerability Database)
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: NVD (National Vulnerability Database)
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
Source: NVD (National Vulnerability Database)
Vulnerability Type
授权机制不正确
Source: NVD (National Vulnerability Database)

Affected Products

VendorProductAffected VersionsCPESubscribe
baptisteArnotypebot.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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Vendor · 1Advisory · 1Patch · 1

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

CVE-2026-3371210.0 CRITICALTypeBot: Unauthenticated SSRF via isolated-vm fetch in preview chat endpoint bypasses SSRF
CVE-2026-284458.7 HIGHTypebot: Stored XSS via Rating Block Custom Icon Bypasses isUnsafe Sandbox in Builder Prev
CVE-2026-399657.7 HIGHTypeBot: SSRF via Open Redirect Bypass in HTTP Request and Code Blocks
CVE-2026-342077.6 HIGHTypeBot: SSRF Protection Bypass via DNS-Resolved Hostnames in Webhook / HTTP Request Valid
CVE-2026-399687.1 HIGHTypeBot: Cross-Workspace Credential Theft via Bot-Engine Preview Endpoint
CVE-2026-284446.5 MEDIUMTypebot: IDOR in Result Logs Endpoint Allows Cross-Workspace Data Disclosure
CVE-2026-399696.5 MEDIUMTypeBot: WhatsApp Webhook Endpoint Missing Signature Verification
CVE-2026-399645.4 MEDIUMTypeBot: Stored XSS via javascript: URI in text bubble links — bot author executes JS on v
CVE-2026-399673.1 LOWTypeBot: Cross-Typebot Result Data Access via Missing typebotId Filter
CVE-2026-39970TypeBot: 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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