CVE-2026-91931
HIGH
NVD
CVSS Score
8.5
Severity
HIGH
Published
Sep 15, 2026
Vendor
unknown
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.