CVE-2026-48495

What it is

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.

At a glance

Exploitability

Can be exploited over the network with a low-privilege account. High risk of data tampering.

Exploit odds

0.4% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2026-08-11 16:17 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-10-23 19:10 UTC Last updatedMost recent change to the record

Details

Published

2026-08-11 16:17 UTC

Last modified

2026-10-23 19:10 UTC

Exploit probability

0.4% · EPSS, next 30 days

Weakness

CWE-862 · Missing authorization

Record status

Deferred

Attack profile CVSS 3.1 · 7.1

Attack vector

Network

Complexity

Low

Privileges needed

Low

User interaction

None

Scope

Unchanged

Confidentiality

Low

Integrity

High

Availability

None