CVE-2026-41269— Flowise: File Upload Validation Bypass in createAttachment
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之前版本存在代码问题漏洞，该漏洞源于Chatflow配置文件上传设置可修改为允许application/javascript MIME类型，导致攻击者上传恶意.js文件。
Possible ATT&CK Techniques 3 AI
T1059 · Command and Scripting Interpreter T1190 · Exploit Public-Facing Application T1505.003 · Web Shell
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I. Basic Information for CVE-2026-41269
Vulnerability Information
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Vulnerability Title
Flowise: File Upload Validation Bypass in createAttachment
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, the Chatflow configuration file upload settings can be modified to allow the application/javascript MIME type. This lets an attacker upload .js files even though the frontend doesn’t normally allow JavaScript uploads. This enables attackers to persistently store malicious Node.js web shells on the server, potentially leading to Remote Code Execution (RCE). This vulnerability is fixed in 3.1.0.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
危险类型文件的不加限制上传
Source: CVE Program / CVE List V5
Vulnerability Title
Flowise 代码问题漏洞
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之前版本存在代码问题漏洞，该漏洞源于Chatflow配置文件上传设置可修改为允许application/javascript MIME类型，导致攻击者上传恶意.js文件。
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
II. Public POCs for CVE-2026-41269
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
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Vendor Advisories for CVE-2026-41269 (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-2026-41270 | 7.1 HIGH | Flowise: SSRF Protection Bypass via Unprotected Built-in HTTP Modules in Custom Function S |
| CVE-2026-41272 | 7.1 HIGH | Flowise: SSRF Protection Bypass (TOCTOU & Default Insecure) |
| CVE-2026-41276 | Flowise: AccountService resetPassword Authentication Bypass Vulnerability | |
| CVE-2026-41266 | Flowise: Sensitive Data Leak in public-chatbotConfig | |
| CVE-2026-41265 | Flowise: Airtable_Agent Code Injection Remote Code Execution Vulnerability | |
| CVE-2026-41275 | Flowise: Password Reset Link Sent Over Unsecured HTTP | |
| CVE-2026-41278 | Flowise: Public chatflow endpoints return unsanitized flowData including plaintext API key | |
| CVE-2026-41271 | Flowise: APIChain Prompt Injection SSRF in GET/POST API Chains | |
| CVE-2026-41268 | Flowise: Flowise Parameter Override Bypass Remote Command Execution | |
| CVE-2026-41279 | Flowise: Unauthenticated TTS endpoint accepts arbitrary credential IDs — enables API credi | |
| CVE-2026-41138 | Flowise: Remote code execution vulnerability in AirtableAgent.ts caused by lack of input v | |
| CVE-2026-41137 | Flowise: Code Injection in CSVAgent leads to Authenticated RCE | |
| CVE-2026-41264 | Flowise: CSV Agent Prompt Injection Remote Code Execution Vulnerability | |
| CVE-2026-41277 | Flowise: Mass Assignment in DocumentStore Create Endpoint Leads to Cross-Workspace Object | |
| CVE-2026-41273 | Flowise: Unauthenticated OAuth 2.0 Access Token Disclosure via Public Chatflow | |
| CVE-2026-41274 | Flowise: Cypher Injection in GraphCypherQAChain |
IV. Related Vulnerabilities
Same product: Flowise
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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-2026-100608
Flowise through 3.1.4 Authorization Bypass via BullMQ Dashbo -
CVE-2026-100607
Flowise through 3.1.4 Authentication Bypass via Email-Only S -
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-434
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CVE-2026-104890
Kunstmaan CMS: MediaBundle extension blacklist bypass allows -
CVE-2026-104811
Mitel MiVoice Office 400 Music on Hold WAV File Upload Code -
CVE-2026-105123
W (wcms) through 3.18.0 RCE and Arbitrary File Write via Med -
CVE-2023-54405
H3C CVM Unauthenticated File Upload via fileUpload/upload To -
CVE-2026-104637
onetwothreeneth HospitalManagementSystem controller.php edit
V. Comments for CVE-2026-41269
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