CVE-2026-48763: Baptistearno Typebot.io

High severity, CVSS 8.2. EPSS: 0.5% chance of exploitation in the next 30 days.

TypeBot is a chatbot builder tool. Versions prior to 3.17.0 expose a deprecated public upload endpoint at `GET /api/v1/typebots/{typebotId}/blocks/{blockId}/storage/upload-url` that accepts an attacker-controlled `filePath` and returns a presigned S3 `PUT` URL for that exact key. Because the endpoint only checks that the referenced typebot is public and that the referenced block is a file input block, an unauthenticated attacker who knows a valid public `typebotId` and `blockId` can request presigned upload URLs for arbitrary objects in the shared bucket, including `private/...` and other tenants' `public/...` paths. Version 3.17.0 fixes this issue.

Affected products

• Baptistearno Typebot.io: before 3.17.0 (fixed in 3.17.0)

Published 2026-08-11. Last modified 2026-09-09.