CVE-2026-48768 Details
Description
TypeBot is a chatbot builder tool. In versions 3.16.1 and earlier, POST /api/blocks/file-input/v3/generate-upload-url is unauthenticated and uses unsanitized fileName input to construct public/ S3 object keys, while issuing presigned PUT URLs that do not bind Content-Type. As a result, any anonymous visitor to a published bot with a file input can upload attacker-controlled HTML, SVG, or JS to attacker-chosen subpaths, including other tenants’ publicly served result paths, enabling arbitrary content hosting and potential stored XSS on the storage origin. ../ traversal is blocked by S3/MinIO canonicalization (signature mismatch), but forward-slash path injection is exploitable. This issue has been fixed in version 3.17.0.
A vulnerability in TypeBot, a chatbot builder tool, allows unauthenticated users to upload files to an S3 bucket on behalf of a TypeBot user. This issue is present in TypeBot versions through 3.16.1. The vulnerability arises because the 'generate-upload-url' endpoint does not properly sanitize the 'fileName' input, allowing for the injection of arbitrary file paths. The uploaded files can include HTML, SVG, or JavaScript, which could be executed as stored cross-site scripting (XSS) when the file is accessed. The issue has been patched in TypeBot version 3.17.0.
Users can update to TypeBot version 3.17.0 or later, where this vulnerability has been fixed.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Jun 18, 2026CISA-ADP
Assessed Jun 18, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/baptisteArno/typebot.io/security/advisories/GHSA-fp7x-6pqh-vhvf | CISA-ADP | AdvisoryExploitRemedyVendor |
| https://github.com/baptisteArno/typebot.io/releases/tag/v3.17.0 | [email protected] | Release NotesVendor |
| https://github.com/baptisteArno/typebot.io/security/advisories/GHSA-fp7x-6pqh-vhvf | [email protected] | AdvisoryExploitRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-22 | Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') | [email protected] |
| CWE-79 | Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| TypeBot | <= 3.16.1 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 18, 2026 | CVE Modified | CISA-ADP |
| Jun 18, 2026 | New CVE Received | [email protected] |