CVE-2026-48494 TypeBot vulnerable to cross-typebot WhatsApp preview webhook resume via global `wa-preview-{phone}` session ids
An authenticated user can inject arbitrary webhook data into another user's WhatsApp preview session, modifying unpublished flows without authorization.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-48494?
CVE-2026-48494 is a high-severity missing authorization vulnerability in baptisteArno typebot.io, published on 11 Aug 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
TypeBot is a chatbot builder tool. In version 3.16.1, an authenticated user who has read access to any typebot can resume a WhatsApp preview webhook session that belongs to a different typebot by mixing an authorized `typebotId` and `blockId` and a foreign preview phone number tied to another preview session. The WhatsApp test-webhook handler authorizes the parent typebot first, but then resolves the preview chat session only by `wa-preview-{phone}`. As a result, an attacker can inject arbitrary webhook JSON into another workspace's WhatsApp preview session and advance its draft/unpublished flow without any access to the victim typebot. Version 3.17.0 patches the issue.
Weakness: CWE-639
Which versions are affected by CVE-2026-48494?
How do I fix CVE-2026-48494?
No fix has been published for CVE-2026-48494 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-48494 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-48494 exists.
Sources
Also known as GHSA-fqf7-mmp5-j3jq.