CVE-2026-41270— Flowise: SSRF Protection Bypass via Unprotected Built-in HTTP Modules in Custom Function Sandbox
Quick assessment
Affected
FlowiseAI Flowise
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.
Flowise是FlowiseAI开源的一个用于轻松构建 LLM 应用程序的工具。 Flowise 3.1.0之前版本存在访问控制错误漏洞，该漏洞源于Custom Function功能中SSRF保护绕过，允许经过身份验证的用户绕过SSRF控制并访问内部网络资源。
Possible ATT&CK Techniques 1 AI
T1001 · Data Obfuscation
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I. Basic Information for CVE-2026-41270
Vulnerability Information
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Vulnerability Title
Flowise: SSRF Protection Bypass via Unprotected Built-in HTTP Modules in Custom Function Sandbox
Source: CVE Program / CVE List V5
Vulnerability Description
Flowise is a drag & drop user interface to build a customized large language model flow. Prior to 3.1.0, a Server-Side Request Forgery (SSRF) protection bypass vulnerability exists in the Custom Function feature. While the application implements SSRF protection via HTTP_DENY_LIST for axios and node-fetch libraries, the built-in Node.js http, https, and net modules are allowed in the NodeVM sandbox without equivalent protection. This allows authenticated users to bypass SSRF controls and access internal network resources (e.g., cloud provider metadata services) This vulnerability is fixed in 3.1.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
访问控制不恰当
Source: CVE Program / CVE List V5
Vulnerability Title
Flowise 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Flowise是FlowiseAI开源的一个用于轻松构建 LLM 应用程序的工具。 Flowise 3.1.0之前版本存在访问控制错误漏洞，该漏洞源于Custom Function功能中SSRF保护绕过，允许经过身份验证的用户绕过SSRF控制并访问内部网络资源。
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 |
|---|---|---|---|---|
| FlowiseAI | Flowise | < 3.1.0 | - |
|
| FlowiseAI | flowise-components | < 3.1.0 | - |
|
II. Public POCs for CVE-2026-41270
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-41270 (1)
Same Patch Batch · FlowiseAI · 2026-04-23 · 18 CVEs total
| CVE-2026-41267 | 8.1 HIGH | Flowise: Improper Mass Assignment in Account Registration Enables Unauthorized Organizatio |
| CVE-2026-41272 | 7.1 HIGH | Flowise: SSRF Protection Bypass (TOCTOU & Default Insecure) |
| CVE-2026-41269 | 7.1 HIGH | Flowise: File Upload Validation Bypass in createAttachment |
| CVE-2026-41268 | Flowise: Flowise Parameter Override Bypass Remote Command Execution | |
| CVE-2026-41274 | Flowise: Cypher Injection in GraphCypherQAChain | |
| CVE-2026-41277 | Flowise: Mass Assignment in DocumentStore Create Endpoint Leads to Cross-Workspace Object | |
| CVE-2026-41264 | Flowise: CSV Agent Prompt Injection Remote Code Execution Vulnerability | |
| CVE-2026-41137 | Flowise: Code Injection in CSVAgent leads to Authenticated RCE | |
| CVE-2026-41138 | Flowise: Remote code execution vulnerability in AirtableAgent.ts caused by lack of input v | |
| CVE-2026-41279 | Flowise: Unauthenticated TTS endpoint accepts arbitrary credential IDs — enables API credi | |
| CVE-2026-41273 | Flowise: Unauthenticated OAuth 2.0 Access Token Disclosure via Public Chatflow | |
| CVE-2026-41278 | Flowise: Public chatflow endpoints return unsanitized flowData including plaintext API key | |
| CVE-2026-41275 | Flowise: Password Reset Link Sent Over Unsecured HTTP | |
| CVE-2026-41265 | Flowise: Airtable_Agent Code Injection Remote Code Execution Vulnerability | |
| CVE-2026-41266 | Flowise: Sensitive Data Leak in public-chatbotConfig | |
| CVE-2026-41276 | Flowise: AccountService resetPassword Authentication Bypass Vulnerability | |
| CVE-2026-41271 | Flowise: APIChain Prompt Injection SSRF in GET/POST API Chains |
IV. Related Vulnerabilities
Same product: Flowise
-
CVE-2026-100610
Flowise through 3.1.4 Missing Authorization via upsert-histo -
CVE-2026-100609
Flowise through 3.1.4 Insecure Direct Object Reference via C -
CVE-2026-100607
Flowise through 3.1.4 Authentication Bypass via Email-Only S -
CVE-2026-100608
Flowise through 3.1.4 Authorization Bypass via BullMQ Dashbo -
CVE-2026-100606
Flowise through 3.1.4 Authentication Bypass via SSO Email Ma
Same vendor: FlowiseAI
-
CVE-2026-100610
Flowise through 3.1.4 Missing Authorization via upsert-histo -
CVE-2026-100609
Flowise through 3.1.4 Insecure Direct Object Reference via C -
CVE-2026-100607
Flowise through 3.1.4 Authentication Bypass via Email-Only S -
CVE-2026-100608
Flowise through 3.1.4 Authorization Bypass via BullMQ Dashbo -
CVE-2026-100606
Flowise through 3.1.4 Authentication Bypass via SSO Email Ma
Same weakness: CWE-284
-
CVE-2026-103085
WordPress WP User Manager plugin <= 2.9.20 - Privilege Escal -
CVE-2026-105632
Plane: Broken Access Control - joinProject GraphQL mutation -
CVE-2026-104974
Plane: Disabled User Auto-Reactivation on Login -
CVE-2026-102795
Apache Traffic Server: SNI to Host header matching policy is -
CVE-2026-63045
Apache HTTP Server: mod_proxy_ftp PASV address handling
V. Comments for CVE-2026-41270
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