CVE-2026-47704: CWE-639: Authorization Bypass Through User-Controlled Key in baptisteArno typebot.io
TypeBot is a chatbot builder tool. Prior to version 3.17.0, an authenticated user who has read access to any typebot can resume a waiting webhook session that belongs to a different typebot by mixing an authorized `typebotId` and `blockId` and a foreign live `resultId`. The webhook resume handler authorizes the parent typebot first, but then resolves the descendant `result` only by `resultId`. As a result, an attacker can inject arbitrary webhook JSON into another typebot's suspended session and advance its execution without any access to the victim typebot. Version 3.17.0 patches the issue.
AI Analysis
Technical Summary
TypeBot versions before 3.17.0 contain an authorization bypass vulnerability (CWE-639) where the webhook resume handler authorizes the parent typebot but resolves the descendant result only by a user-controlled resultId. This flaw enables an authenticated user with read access to one typebot to resume and manipulate webhook sessions of other typebots by mixing authorized typebotId and blockId with a foreign live resultId. This leads to injection of arbitrary webhook JSON into another typebot's suspended session, allowing unauthorized advancement of its execution. The vulnerability is fixed in version 3.17.0.
Potential Impact
An attacker with read access to any typebot can manipulate webhook sessions of other typebots without having access to those typebots, potentially causing unauthorized execution flow changes. This could lead to unintended behavior or data manipulation within victim typebots.
Mitigation Recommendations
Upgrade to typebot.io version 3.17.0 or later, where this authorization bypass vulnerability is patched. No other mitigation guidance is provided.
CVE-2026-47704: CWE-639: Authorization Bypass Through User-Controlled Key in baptisteArno typebot.io
Description
TypeBot is a chatbot builder tool. Prior to version 3.17.0, an authenticated user who has read access to any typebot can resume a waiting webhook session that belongs to a different typebot by mixing an authorized `typebotId` and `blockId` and a foreign live `resultId`. The webhook resume handler authorizes the parent typebot first, but then resolves the descendant `result` only by `resultId`. As a result, an attacker can inject arbitrary webhook JSON into another typebot's suspended session and advance its execution without any access to the victim typebot. Version 3.17.0 patches the issue.
CVSS v4.0
Score 7.1high
Affected software
baptisteArno
typebot.io
pkg:github/baptistearno/typebot.ioRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
TypeBot versions before 3.17.0 contain an authorization bypass vulnerability (CWE-639) where the webhook resume handler authorizes the parent typebot but resolves the descendant result only by a user-controlled resultId. This flaw enables an authenticated user with read access to one typebot to resume and manipulate webhook sessions of other typebots by mixing authorized typebotId and blockId with a foreign live resultId. This leads to injection of arbitrary webhook JSON into another typebot's suspended session, allowing unauthorized advancement of its execution. The vulnerability is fixed in version 3.17.0.
Potential Impact
An attacker with read access to any typebot can manipulate webhook sessions of other typebots without having access to those typebots, potentially causing unauthorized execution flow changes. This could lead to unintended behavior or data manipulation within victim typebots.
Mitigation Recommendations
Upgrade to typebot.io version 3.17.0 or later, where this authorization bypass vulnerability is patched. No other mitigation guidance is provided.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-05-19T21:18:20.404Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a7b4d4abf8831d53907d317
Added to database: 08/11/2026, 16:26:50 UTC
Last enriched: 08/11/2026, 16:41:08 UTC
Last updated: 09/25/2026, 01:47:43 UTC
Views: 68
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