Skip to content
OpenAdvisories
Low · 3.1 CVE-2026-39967 EUVD-2026-31486

TypeBot: Cross-Typebot Result Data Access via Missing typebotId Filter

Published May 22, 2026 · Updated May 26, 2026 · Assigned by GitHub_M

Description

TypeBot is a chatbot builder tool. In versions 3.15.2 and prior, the bot engine's the findResult query does not filter results by typebotId, allowing an authenticated user to load result data (user answers, variable values) from a different typebot by supplying a foreign resultId to the startChat endpoint. Exploitation is constrained by CUID2's cryptographically random 24-character IDs (making brute-force infeasible), the requirement that rememberUser be enabled, and the need for matching variable names in the current typebot. If successfully exploited, an attacker can access the original user's previous answers, session variable values, and hasStarted flag, potentially exposing PII like names, emails, and phone numbers. This issue has been fixed in version 3.16.0.

Affected products

VendorProductAffectedFixed
baptisteArno typebot.io < 3.16.0 —

References