CVE-2026-48763

Status: DeferredHigh (8.2)—

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

Version: 3.1
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
Base score: 8.2

Exploitation probability (EPSS)

Probability of exploitation in the next 30 days: 0.53%
Percentile among all scored CVEs: 43
Score date: 10/5/2026

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

🎯 ATT&CK techniques

How this vulnerability is exploited and what the attacker gains, in MITRE ATT&CK terms.

ExploitationT1190 Exploit Public-Facing Applicationinitial access95 %
Primary impactT1578.002 Create Cloud Instancedefense impairment85 %
Secondary impactT1657 Financial Theftimpact75 %

Endpoint público sin autenticación (AV:N, PR:N) permite a atacante no autenticado obtener URLs presignadas de S3 para escribir en rutas arbitrarias del bucket compartido, comprometiendo integridad de datos de otros tenants. CWE-862 (Missing Authorization).

Inferred by our analysis agent from the official description, CVSS vector and CWE, and checked by a supervisor. May contain errors.

🛡️ ATT&CK mitigations that cover these techniques

User Account Management Vulnerability Scanning User Training Privileged Account Management Network Segmentation Limit Access to Resource Over Network

Affected technologies (1)

⚠ AI-inferred from the description — NVD hasn't analyzed this CVE yet, these aren't verified CPEs.

Typebot — Typebot^AI

CWEs

CWE-862

References

Raw JSON (NVD)

Show

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  "published": "2026-08-11T21:17:36.810",
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  "lastModified": "2026-09-09T20:46:28.353",
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