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CVE PROGRAM SOURCE RECORD9.0 Critical

CVE-2026-73601

Flowise before 3.1.3 Remote Code Execution via Custom MCP

Read JSON ↗CVE.org ↗
Status
Published
Published
Updated
Assigning organization
VulnCheck

Description

Flowise versions before 3.1.3 contain a remote code execution vulnerability in the Custom MCP node when CUSTOM_MCP_PROTOCOL is set to stdio, allowing authenticated users to execute arbitrary commands by manipulating environment variables and command arguments. Attackers can abuse PYTHONWARNINGS and BROWSER environment variables with python3, or leverage the root working directory with node to bypass validation and execute system commands.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

FlowiseAI Flowise

Default version status: unaffected

  • 0 to < 3.1.3affected
  • 3.1.3unaffected
pkg:npm/flowise

FlowiseAI Flowise

Default version status: unaffected

  • 0 to < 3.1.3affected
  • 3.1.3unaffected
pkg:npm/flowise-components

References