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CVE-2026-48763— TypeBot has Arbitrary S3 Object Write in deprecated public upload endpoint via attacker-controlled filePath

Quick assessment

Affected
baptisteArno typebot.io
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Baptiste Arnaud Typebot是Baptiste Arnaud个人开发者的一个可视化聊天机器人构建平台。 Baptiste Arnaud Typebot 3.17.0之前版本存在授权问题漏洞，该漏洞源于公共上传端点未正确验证访问权限，接受攻击者控制的filePath参数，可能导致未经身份验证的攻击者获取共享桶中任意对象的预签名上传URL。

CVSS 8.2 · High EPSS 0.53% · P43

Affected Version Matrix 1

VendorProduct Version RangeStatus
baptisteArno typebot.io < 3.17.0 affected
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I. Basic Information for CVE-2026-48763

Vulnerability Information
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Vulnerability Title
TypeBot has Arbitrary S3 Object Write in deprecated public upload endpoint via attacker-controlled filePath
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Baptiste Arnaud Typebot 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Baptiste Arnaud Typebot是Baptiste Arnaud个人开发者的一个可视化聊天机器人构建平台。 Baptiste Arnaud Typebot 3.17.0之前版本存在授权问题漏洞，该漏洞源于公共上传端点未正确验证访问权限，接受攻击者控制的filePath参数，可能导致未经身份验证的攻击者获取共享桶中任意对象的预签名上传URL。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
baptisteArno typebot.io < 3.17.0 -

II. Public POCs for CVE-2026-48763

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III. Intelligence Information for CVE-2026-48763

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Patches & Fixes for CVE-2026-48763 (2)

Vendor Advisories for CVE-2026-48763 (1)

Vendor Pages for CVE-2026-48763 (1)

Same Patch Batch · baptisteArno · 2026-08-11 · 12 CVEs total

CVE-2026-48765 9.9 CRITICAL TypeBot vulnerable to cross-workspace OAuth credential takeover in updateOAuthCredentials
CVE-2026-47705 9.6 CRITICAL TypeBot vulnerable to CSV injection in result export
CVE-2026-47702 9.1 CRITICAL TypeBot API tokens stored in plaintext
CVE-2026-48766 7.6 HIGH TypeBot vulnerable to OpenAI API key exfiltration in listModels via attacker-controlled ba
CVE-2026-48767 7.6 HIGH Google Sheets OAuth access token disclosure to guest members via getAccessToken
CVE-2026-42142 7.1 HIGH TypeBot has Authorization Bypass in Google Sheets `getSheets` Endpoint that Allows Cross-W
CVE-2026-48495 7.1 HIGH TypeBot Google Sheets OAuth callback can create credentials in unauthorized workspaces and
CVE-2026-47704 7.1 HIGH TypeBot vulnerable to cross-typebot webhook resume via unchecked `resultId` lineage allows
CVE-2026-48494 7.1 HIGH TypeBot vulnerable to cross-typebot WhatsApp preview webhook resume via global `wa-preview
CVE-2026-48483 5.4 MEDIUM TypeBot's WhatsApp status forwarding uses unvalidated user-controlled URLs, allowing SSRF
CVE-2026-48762 5.4 MEDIUM TypeBot Vulnerable to Server-Side Request Forgery (SSRF) in OpenAI Transcription Handler

IV. Related Vulnerabilities

Same product: typebot.io
Same vendor: baptisteArno
Same weakness: CWE-862

V. Comments for CVE-2026-48763

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