CVE-2026-39966

Description

TypeBot is a chatbot builder tool. In versions 3.15.2, the getLinkedTypebots API endpoint returns full bot definitions to any authenticated user who references a target bot ID in a Typebot Link block, regardless of workspace ownership, leading to IDOR. The authorization check uses Array.filter() with an async callback — since filter() is synchronous, the callback always returns a truthy Promise, so the access control predicate is never actually evaluated. Any authenticated Typebot user can read the full definition of any other workspace's private bots, including: all conversation blocks and logic flow, variable values embedded in the bot (credentials, API keys, PII), webhook URLs and integration configurations. This issue has been fixed in version 3.16.0.

Predictions

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No vendor mitigations ingested yet for this CVE. The mitigation-content worker queues fetches as references arrive — check back in a few minutes, or see the references list below.

References

• https://github.com/baptisteArno/typebot.io/commit/b9530a089b43bfa6e79e3ff9cbfab921ce832f45
• https://github.com/baptisteArno/typebot.io/releases/tag/v3.16.0
• https://github.com/baptisteArno/typebot.io/security/advisories/GHSA-3fr5-999r-84qj
• https://github.com/baptisteArno/typebot.io/security/advisories/GHSA-3fr5-999r-84qj

CWEs

CWE-863