Description
Flowise before 3.1.4 contains a remote code execution vulnerability in the Custom MCP node that allows authenticated attackers to execute arbitrary code by supplying npx package names in the mcpServerConfig parameter. Attackers can invoke npx with attacker-controlled npm packages to execute code on the Flowise server.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| FlowiseAI | Flowise | < 3.1.4 | 3.1.4 |
Advisories 1
- WID-SEC-2026-3102 Flowise: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 15, 2026
References
- GitHub Security Advisory (GHSA-vcwp-f9rq-3887) vendor-advisory
- VulnCheck Advisory: Flowise before 3.1.4 Remote Code Execution via Custom MCP npx third-party-advisory