CVE-2026-48494
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an attacker can inject arbitrary webhook JSON into another workspace's WhatsApp preview session and advance its draft/unpublished flow without any access to the victim typebot.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.
What this means for your business
- FIRST's prediction model gives it a 0.4% chance of attack attempts being seen in the next 30 days, ranking above 36% of all known flaws.
What to do
- 1Ask your IT team or provider whether any of your systems use the affected product.
- 2If you do, follow the vendor's guidance. No patch reference has been published yet.
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Scoring
- CVSS
- Not yet scored
- CVSS v4
- 7.1
- Weakness
- CWE-639
- Assigned by
- security-advisories@github.com
Dates
- Published
- 2026-08-11
- Last modified
- 2026-09-09
- Sources
- NVD
References
- https://github.com/baptisteArno/typebot.io/commit/36a618610174fd168fb255d9c8ecc0d2cf61a192
- https://github.com/baptisteArno/typebot.io/pull/2499
- https://github.com/baptisteArno/typebot.io/releases/tag/v3.17.0
- https://github.com/baptisteArno/typebot.io/security/advisories/GHSA-fqf7-mmp5-j3jq
- https://github.com/baptisteArno/typebot.io/security/advisories/GHSA-fqf7-mmp5-j3jq