Vulnerability · Published Aug 11, 2026 · Assigned by GitHub_M

CVE-2026-48494TypeBot vulnerable to cross-typebot WhatsApp preview webhook resume via global `wa-preview-{phone}` session ids

High 7.1

In plain English

A high-severity authorization bypass via user-controlled key in typebot.io from baptisteArno. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 40% of all known vulnerabilities).

Severity (CVSS 4.0)7.1High

Exploit odds (30 days)0.5%top 59.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

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an attacker can inject arbitrary webhook JSON into another workspace's WhatsApp preview session and advance its draft/unpublished flow without any access to the victim typebot.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.

Affected products (as reported)

Vendor	Product	Versions
baptisteArno	typebot.io	= 3.16.1

Weakness: CWE-639 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N

References

https://github.com/baptisteArno/typebot.io/security/advisories/GHSA-fqf7-mmp5-j3jq x_refsource_CONFIRM
https://github.com/baptisteArno/typebot.io/pull/2499 x_refsource_MISC
https://github.com/baptisteArno/typebot.io/commit/36a618610174fd168fb255d9c8ecc0d2cf61a192 x_refsource_MISC
https://github.com/baptisteArno/typebot.io/releases/tag/v3.17.0 x_refsource_MISC