CVE-2026-33712— TypeBot: Unauthenticated SSRF via isolated-vm fetch in preview chat endpoint bypasses SSRF controls
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.
Typebot是Baptiste Arnaud个人开发者的一个开源聊天机器人构建器。 Typebot 3.15.2及之前版本存在安全漏洞，该漏洞源于预览聊天端点允许未经验证的用户通过提供自定义类型机器人定义实现服务器端请求伪造，绕过SSRF验证，可能导致云凭证窃取、内部网络访问和数据渗漏。
Possible ATT&CK Techniques 2 AI
T1059 · Command and Scripting Interpreter T1190 · Exploit Public-Facing ApplicationAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| baptisteArno | typebot.io | < 3.16.0 |
affected |
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I. Basic Information for CVE-2026-33712
Vulnerability Information
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Vulnerability Title
TypeBot: Unauthenticated SSRF via isolated-vm fetch in preview chat endpoint bypasses SSRF controls
Source: CVE Program / CVE List V5
Vulnerability Description
Typebot is a chatbot builder tool. In versions 3.15.2 and prior, the preview chat endpoint (POST /api/v1/typebots/{typebotId}/preview/startChat) allows unauthenticated users to achieve Server-Side Request Forgery (SSRF) by supplying a custom typebot definition with server-side code blocks. The fetch function exposed inside the isolated-vm sandbox calls Node.js native fetch without the SSRF validation (validateHttpReqUrl) that protects the HTTP Request block. This bypasses all SSRF mitigations added after GHSA-8gq9-rw7v-3jpr. Exploitation of this unauthenticated SSRF vulnerability can lead to cloud credential theft, internal network access and data exfiltration for any self-hosted Typebot deployments and hosted services. This issue has been fixed in version 3.16.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Typebot 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Typebot是Baptiste Arnaud个人开发者的一个开源聊天机器人构建器。 Typebot 3.15.2及之前版本存在安全漏洞，该漏洞源于预览聊天端点允许未经验证的用户通过提供自定义类型机器人定义实现服务器端请求伪造，绕过SSRF验证，可能导致云凭证窃取、内部网络访问和数据渗漏。
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 | < 3.16.0 | - |
|
II. Public POCs for CVE-2026-33712
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-33712 (1)
Vendor Pages for CVE-2026-33712 (1)
Same Patch Batch · baptisteArno · 2026-05-22 · 11 CVEs total
| CVE-2026-28445 | 8.7 HIGH | Typebot: Stored XSS via Rating Block Custom Icon Bypasses isUnsafe Sandbox in Builder Prev |
| CVE-2026-39965 | 7.7 HIGH | TypeBot: SSRF via Open Redirect Bypass in HTTP Request and Code Blocks |
| CVE-2026-34207 | 7.6 HIGH | TypeBot: SSRF Protection Bypass via DNS-Resolved Hostnames in Webhook / HTTP Request Valid |
| CVE-2026-39968 | 7.1 HIGH | TypeBot: Cross-Workspace Credential Theft via Bot-Engine Preview Endpoint |
| CVE-2026-28444 | 6.5 MEDIUM | Typebot: IDOR in Result Logs Endpoint Allows Cross-Workspace Data Disclosure |
| CVE-2026-39966 | 6.5 MEDIUM | TypeBot: Async filter() bypasses authorization, allowing IDOR in getLinkedTypebots and lea |
| CVE-2026-39969 | 6.5 MEDIUM | TypeBot: WhatsApp Webhook Endpoint Missing Signature Verification |
| CVE-2026-39964 | 5.4 MEDIUM | TypeBot: Stored XSS via javascript: URI in text bubble links — bot author executes JS on v |
| CVE-2026-39967 | 3.1 LOW | TypeBot: Cross-Typebot Result Data Access via Missing typebotId Filter |
| CVE-2026-39970 | TypeBot: Stored Cross-Site Scripting (XSS) via SVG File Upload On Profile Picture Form |
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V. Comments for CVE-2026-33712
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