---
cve: "CVE-2026-48768"
severity: "CRITICAL"
cvss: 9.3
epss: "27%"
vendor: "baptisteArno"
kev: false
exploited: false
published: "2026-06-17 23:13:41"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-09-06T17:02:21+02:00"
---

# CVE-2026-48768

> 9.3 CRITICAL · 🧪 PoC

## Beschreibung

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.

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Keine | bad |
| UI Interaktion | Keine | bad |
| S Scope | Verändert | bad |
| C Vertraulichkeit | Gering | warn |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Keine | good |

## Patch verfügbar (OSV)

- 31c360a342e40d1423e5421c046e8f821b1154c4 (Commit)

## Referenzen

- <https://github.com/baptisteArno/typebot.io/security/advisories/GHSA-fp7x-6pqh-vhvf>
- <https://github.com/baptisteArno/typebot.io/releases/tag/v3.17.0>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-48768) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_