---
cve: "CVE-2026-48763"
severity: "HIGH"
cvss: 8.2
epss: "31%"
vendor: "baptisteArno"
kev: false
exploited: false
published: "2026-08-11 21:17:36"
tags: [cve, security, high]
source: tsecurity.de CVE-Dossier
exported: "2026-09-06T15:24:02+02:00"
---

# CVE-2026-48763

> 8.2 HIGH · 🧪 PoC

## Beschreibung

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.

## CVSS-Vektor

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

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

## Patch verfügbar (OSV)

- 7ae4c007d0987d2ca907b47e1b7418db62b8a157 (Commit)
- 31c360a342e40d1423e5421c046e8f821b1154c4 (Commit)

## Referenzen

- <https://github.com/baptisteArno/typebot.io/security/advisories/GHSA-m7f5-3wcm-x2c4>
- <https://github.com/baptisteArno/typebot.io/pull/2459>
- <https://github.com/baptisteArno/typebot.io/commit/7ae4c007d0987d2ca907b47e1b7418db62b8a157>
- <https://github.com/baptisteArno/typebot.io/releases/tag/v3.17.0>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/cve?cve=CVE-2026-48763) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI BITS_