Flowise
CVE-2025-26319
CRITICAL
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
Lifecycle Timeline
3DescriptionCVE.org
FlowiseAI Flowise v2.2.6 was discovered to contain an arbitrary file upload vulnerability in /api/v1/attachments.
AnalysisAI
FlowiseAI Flowise version 2.2.6 contains an arbitrary file upload vulnerability in the /api/v1/attachments endpoint. Unauthenticated attackers can upload malicious files including executable scripts, achieving remote code execution on the Flowise server.
Technical ContextAI
The /api/v1/attachments API endpoint allows file uploads without authentication or file type validation. An attacker can upload a .js, .py, or other executable file type. Depending on the server configuration and how uploaded files are served, this can lead to server-side code execution. Even without direct execution, uploaded files can overwrite application files or be used for phishing.
RemediationAI
Update Flowise to the latest version. Implement authentication on all API endpoints. Configure strict file type allowlisting on upload endpoints. Run Flowise in a sandboxed container with minimal privileges. Monitor the attachments directory for unexpected file types.
Flowise version 3.0.5 contains a remote code execution vulnerability in the CustomMCP node. The mcpServerConfig paramete
Flowise versions before 3.0.1 allow unauthenticated access to the Custom MCPs feature, which is designed to execute OS c
Remote code execution in Flowise before 3.1.2 allows any authenticated user (or API caller with chatflow view/update per
Flowise is a drag & drop user interface to build a customized large language model flow. Rated critical severity (CVSS 9
Unrestricted file upload in Flowise LLM workflow builder before 3.0.13 via /api/v1/attachments endpoint allows unauthent
Missing authentication on NVD data endpoint in Flowise before 3.0.13 allows unauthenticated access to internal vulnerabi
Remote code execution in Flowise before 3.1.3 arises because its Pyodide Python-code validator (validatePythonCodeForDat
Remote code execution in FlowiseAI Flowise before 3.1.3 lets an attacker execute arbitrary OS commands as the Flowise pr
Remote command execution in Flowise <= 3.1.2 lets an authenticated user break out of the vm2/@flowiseai/nodevm JavaScrip
Arbitrary file read and write in FlowiseAI Flowise (versions 2.2.8 through 3.0.5) lets remote unauthenticated attackers
Authenticated remote code execution in FlowiseAI Flowise prior to 3.1.2 allows any user with a valid session or API key
Remote code execution in Flowise before 3.1.3 lets authenticated users abuse the Custom MCP node - when CUSTOM_MCP_PROTO
Same technique File Upload
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External POC / Exploit Code
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