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CVE-2026-39966: CWE-863: Incorrect Authorization in baptisteArno typebot.io

0
Medium
VulnerabilityCVE-2026-39966cvecve-2026-39966cwe-863
Published: Fri May 22 2026 (05/22/2026, 18:12:32 UTC)
Source: CVE Database V5
Vendor/Project: baptisteArno
Product: typebot.io

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.

AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 05/22/2026, 18:59:59 UTC

Technical Analysis

TypeBot versions before 3.16.0 contain an incorrect authorization vulnerability (CWE-863) in the getLinkedTypebots API endpoint. The endpoint returns full bot definitions to any authenticated user referencing a target bot ID, regardless of workspace ownership. The root cause is misuse of an async callback with Array.filter(), which is synchronous, resulting in the access control predicate always evaluating as true. This allows unauthorized access to private bot data including conversation blocks, logic flow, sensitive variables, and integration details. The vulnerability is addressed in version 3.16.0.

Potential Impact

Any authenticated user of TypeBot prior to version 3.16.0 can access private bot definitions belonging to other workspaces. This exposure includes sensitive information such as credentials, API keys, personally identifiable information, webhook URLs, and integration configurations. The confidentiality of private workspace data is compromised, but there is no indication of impact to integrity or availability. No known exploits in the wild have been reported.

Mitigation Recommendations

Upgrade TypeBot to version 3.16.0 or later, where this authorization issue has been fixed. Since this is a self-hosted product, users must apply the update themselves. Patch status is confirmed by the vendor advisory stating the fix is included in version 3.16.0. Until upgraded, restrict authenticated user access where possible to limit exposure.

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Technical Details

Data Version
5.2
Assigner Short Name
GitHub_M
Date Reserved
2026-04-08T00:01:47.627Z
Cvss Version
3.1
State
PUBLISHED
Remediation Level
null

Threat ID: 6a10a423e1370fbb48342fd6

Added to database: 5/22/2026, 6:44:51 PM

Last enriched: 5/22/2026, 6:59:59 PM

Last updated: 5/23/2026, 5:10:18 PM

Views: 12

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