---
id: CVE-2026-48763
title: TypeBot is a chatbot builder tool
summary: >-
  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…
severity: high
cvss: 8.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L'
cwe:
  - CWE-862
published: '2026-08-11'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T20:46:28.353'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-48763'
references:
  - url: >-
      https://github.com/baptisteArno/typebot.io/commit/7ae4c007d0987d2ca907b47e1b7418db62b8a157
    label: security-advisories@github.com
  - url: 'https://github.com/baptisteArno/typebot.io/pull/2459'
    label: security-advisories@github.com
  - url: 'https://github.com/baptisteArno/typebot.io/releases/tag/v3.17.0'
    label: security-advisories@github.com
  - url: >-
      https://github.com/baptisteArno/typebot.io/security/advisories/GHSA-m7f5-3wcm-x2c4
    label: security-advisories@github.com
  - url: >-
      https://github.com/baptisteArno/typebot.io/security/advisories/GHSA-m7f5-3wcm-x2c4
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00526
epssPercentile: 0.42077
ingestedAt: '2026-09-09T21:22:45.530Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.