CVE-2026-39967: CWE-639: Authorization Bypass Through User-Controlled Key in baptisteArno typebot.io
TypeBot is a chatbot builder tool. In versions 3.15.2 and prior, the bot engine's the findResult query does not filter results by typebotId, allowing an authenticated user to load result data (user answers, variable values) from a different typebot by supplying a foreign resultId to the startChat endpoint. Exploitation is constrained by CUID2's cryptographically random 24-character IDs (making brute-force infeasible), the requirement that rememberUser be enabled, and the need for matching variable names in the current typebot. If successfully exploited, an attacker can access the original user's previous answers, session variable values, and hasStarted flag, potentially exposing PII like names, emails, and phone numbers. This issue has been fixed in version 3.16.0.
AI Analysis
Technical Summary
TypeBot versions prior to 3.16.0 contain an authorization bypass vulnerability (CWE-639) in the bot engine's findResult query, which does not filter results by typebotId. This allows authenticated users to retrieve data from other typebots by providing a foreign resultId to the startChat endpoint. The vulnerability is mitigated by the use of cryptographically random 24-character CUID2 IDs, the necessity of the rememberUser feature being enabled, and the requirement for matching variable names in the current typebot. If exploited, attackers can access previous user answers, session variable values, and the hasStarted flag, potentially exposing PII such as names, emails, and phone numbers. The issue is resolved in version 3.16.0.
Potential Impact
An attacker with authenticated access can potentially retrieve data belonging to other users' typebots, including previous answers and session variables that may contain PII. The impact is limited by the difficulty of guessing valid resultIds due to cryptographically random identifiers and feature requirements. The CVSS score is 3.1, indicating a low severity impact primarily on confidentiality.
Mitigation Recommendations
This vulnerability is fixed in typebot.io version 3.16.0. Users should upgrade to version 3.16.0 or later to remediate the issue. Since this is not a cloud service, patching the affected software is required. No other mitigation steps are indicated by the vendor advisory.
CVE-2026-39967: CWE-639: Authorization Bypass Through User-Controlled Key in baptisteArno typebot.io
Description
TypeBot is a chatbot builder tool. In versions 3.15.2 and prior, the bot engine's the findResult query does not filter results by typebotId, allowing an authenticated user to load result data (user answers, variable values) from a different typebot by supplying a foreign resultId to the startChat endpoint. Exploitation is constrained by CUID2's cryptographically random 24-character IDs (making brute-force infeasible), the requirement that rememberUser be enabled, and the need for matching variable names in the current typebot. If successfully exploited, an attacker can access the original user's previous answers, session variable values, and hasStarted flag, potentially exposing PII like names, emails, and phone numbers. This issue has been fixed in version 3.16.0.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
TypeBot versions prior to 3.16.0 contain an authorization bypass vulnerability (CWE-639) in the bot engine's findResult query, which does not filter results by typebotId. This allows authenticated users to retrieve data from other typebots by providing a foreign resultId to the startChat endpoint. The vulnerability is mitigated by the use of cryptographically random 24-character CUID2 IDs, the necessity of the rememberUser feature being enabled, and the requirement for matching variable names in the current typebot. If exploited, attackers can access previous user answers, session variable values, and the hasStarted flag, potentially exposing PII such as names, emails, and phone numbers. The issue is resolved in version 3.16.0.
Potential Impact
An attacker with authenticated access can potentially retrieve data belonging to other users' typebots, including previous answers and session variables that may contain PII. The impact is limited by the difficulty of guessing valid resultIds due to cryptographically random identifiers and feature requirements. The CVSS score is 3.1, indicating a low severity impact primarily on confidentiality.
Mitigation Recommendations
This vulnerability is fixed in typebot.io version 3.16.0. Users should upgrade to version 3.16.0 or later to remediate the issue. Since this is not a cloud service, patching the affected software is required. No other mitigation steps are indicated by the vendor advisory.
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: 6a10ab3fe1370fbb483c4ae0
Added to database: 5/22/2026, 7:15:11 PM
Last enriched: 5/22/2026, 7:16:00 PM
Last updated: 5/23/2026, 10:32:14 AM
Views: 9
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