Injection Flaw in TypeBot Webhook for Different Preview Sessions
CVE-2026-48494

7.1HIGH

Key Information:

Vendor

Baptistearno

Status
Typebot.io
Vendor
CVE Published:
11 August 2026

What is CVE-2026-48494?

In TypeBot version 3.16.1, a serious vulnerability allows an authenticated user with read access to manipulate WhatsApp preview sessions of other typebots. By improperly mixing an authorized typebotId and blockId with a foreign preview phone number, an attacker can inject arbitrary JSON into another workspace's WhatsApp preview session. This breach occurs because the WhatsApp test-webhook handler fails to correctly authenticate the preview chat session, relying solely on a format rather than validating access rights. Users are encouraged to upgrade to version 3.17.0, which addresses this vulnerability and enhances overall security.

Affected Version(s)

typebot.io = 3.16.1

References

https://github.com/baptisteArno/typebot.io/security/advis...
x_refsource_CONFIRM
https://github.com/baptisteArno/typebot.io/pull/2499
x_refsource_MISC
https://github.com/baptisteArno/typebot.io/commit/36a6186...
x_refsource_MISC

CVSS V4

Score:
7.1
Severity:
HIGH
Confidentiality:
None
Integrity:
High
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.