BaptisteArno TypeBot up to 3.16.1 upload-url filePath unrestricted upload

Summaryinfo

A vulnerability marked as critical has been reported in BaptisteArno TypeBot. This affects an unknown part of the file /api/v1/typebots/{typebotId}/blocks/{blockId}/storage/upload-url. Performing a manipulation of the argument filePath results in unrestricted upload. This vulnerability is known as CVE-2026-48763. Remote exploitation of the attack is possible. No exploit is available.

Detailsinfo

A vulnerability classified as critical has been found in BaptisteArno TypeBot. This affects an unknown code of the file /api/v1/typebots/{typebotId}/blocks/{blockId}/storage/upload-url. The manipulation of the argument filePath with an unknown input leads to a unrestricted upload vulnerability. CWE is classifying the issue as CWE-434. The product allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-48763 since 05/22/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1608.002 for this issue.

Upgrading to version 3.17.0 eliminates this vulnerability.

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Productinfo

Vendor

• BaptisteArno

Name

• TypeBot

Version

• 2.24.0
• 3.13.0
• 3.13.1
• 3.13.2
• 3.16.0
• 3.16.1

CPE 2.3info

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CPE 2.2info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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