Description
TypeBot is a chatbot builder tool. Prior to version 3.17.0, the Google Sheets OAuth callback decodes a base64-encoded JSON `state` parameter and trusts the embedded `workspaceId`, `typebotId`, `blockId`, and `redirectUrl` without cryptographic integrity protection or authorization checks. The callback route is authenticated, but it does not verify that the authenticated user has write access to the target workspace or Typebot before creating credentials in the workspace or updating Typebot groups. An authenticated user who can obtain a valid Google OAuth `code` can alter the `state` value to create Google Sheets credentials in another workspace and, if target IDs are known, attach those credentials to a block in another Typebot. Version 3.17.0 patches the issue.
Published: 2026-08-11
Score: 7.1 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Tracking

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History

Thu, 13 Aug 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 13 Aug 2026 05:15:00 +0000

Type Values Removed Values Added
First Time appeared Baptistearno
Baptistearno typebot.io
Vendors & Products Baptistearno
Baptistearno typebot.io

Tue, 11 Aug 2026 16:15:00 +0000

Type Values Removed Values Added
Description TypeBot is a chatbot builder tool. Prior to version 3.17.0, the Google Sheets OAuth callback decodes a base64-encoded JSON `state` parameter and trusts the embedded `workspaceId`, `typebotId`, `blockId`, and `redirectUrl` without cryptographic integrity protection or authorization checks. The callback route is authenticated, but it does not verify that the authenticated user has write access to the target workspace or Typebot before creating credentials in the workspace or updating Typebot groups. An authenticated user who can obtain a valid Google OAuth `code` can alter the `state` value to create Google Sheets credentials in another workspace and, if target IDs are known, attach those credentials to a block in another Typebot. Version 3.17.0 patches the issue.
Title TypeBot Google Sheets OAuth callback can create credentials in unauthorized workspaces and modify arbitrary typebots
Weaknesses CWE-862
References
Metrics cvssV3_1

{'score': 7.1, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N'}


Subscriptions

Baptistearno Typebot.io
cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-08-13T14:41:51.456Z

Reserved: 2026-05-21T15:33:08.292Z

Link: CVE-2026-48495

cve-icon Vulnrichment

Updated: 2026-08-13T14:41:29.940Z

cve-icon NVD

Status : Received

Published: 2026-08-11T16:17:32.170

Modified: 2026-08-13T15:19:40.887

Link: CVE-2026-48495

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-13T05:00:10Z

Weaknesses