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OpenAdvisories
High · 7.1 CVE-2026-47704 EUVD-2026-56220

TypeBot vulnerable to cross-typebot webhook resume via unchecked `resultId` lineage allows unauthorized control of another bot's waiting session

Published Aug 11, 2026 · Updated Aug 12, 2026 · Assigned by GitHub_M

Description

TypeBot is a chatbot builder tool. Prior to version 3.17.0, an authenticated user who has read access to any typebot can resume a waiting webhook session that belongs to a different typebot by mixing an authorized `typebotId` and `blockId` and a foreign live `resultId`. The webhook resume handler authorizes the parent typebot first, but then resolves the descendant `result` only by `resultId`. As a result, an attacker can inject arbitrary webhook JSON into another typebot's suspended session and advance its execution without any access to the victim typebot. Version 3.17.0 patches the issue.

Affected products

VendorProductAffectedFixed
baptisteArno typebot.io < 3.17.0 —

References