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CVE-2026-48768— TypeBot: Unauthenticated arbitrary s3 object write in generate-upload-url via unsanitized fileName

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.

baptisteArno typebot.io是baptisteArno的开源在线表单构建工具。 baptisteArno typebot.io 3.17.0之前版本存在安全漏洞，该漏洞源于未清理的fileName输入在构建public/ S3对象键时存在问题，可能导致匿名访问者上传攻击者控制的HTML、SVG或JS文件，实现任意内容托管和潜在的存储型跨站脚本攻击。

CVSS 9.3 · Critical EPSS 0.41% · P33

Affected Version Matrix 1

VendorProduct Version RangeStatus
baptisteArno typebot.io < 3.17.0 affected
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I. Basic Information for CVE-2026-48768

Vulnerability Information
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Vulnerability Title
TypeBot: Unauthenticated arbitrary s3 object write in generate-upload-url via unsanitized fileName
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
baptisteArno typebot.io 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
baptisteArno typebot.io是baptisteArno的开源在线表单构建工具。 baptisteArno typebot.io 3.17.0之前版本存在安全漏洞，该漏洞源于未清理的fileName输入在构建public/ S3对象键时存在问题，可能导致匿名访问者上传攻击者控制的HTML、SVG或JS文件，实现任意内容托管和潜在的存储型跨站脚本攻击。
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-2026-48768

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III. Intelligence Information for CVE-2026-48768

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Vendor Advisories for CVE-2026-48768 (1)

Vendor Pages for CVE-2026-48768 (1)

Same Patch Batch · baptisteArno · 2026-06-17 · 3 CVEs total

CVE-2026-48764 8.2 HIGH TypeBot has SSRF in HTTP request and script fetch flows via DNS rebinding bypass
CVE-2026-48759 7.1 HIGH TypeBot: Cross-Workspace Theme Template IDOR (Modification and Deletion)

IV. Related Vulnerabilities

Same product: typebot.io
Same vendor: baptisteArno
Same weakness: CWE-22

V. Comments for CVE-2026-48768

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