VULNERABILITY INTELLIGENCE

CVE-2026-73601

CVSS score9 CRITICAL
EPSS probability1.10%
CISA KEVNot currently listed
Published2026-08-13
Last modified2026-10-24
CVSS vectorCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

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.

Weakness classification

  • CWE-95: Improper Neutralization of Directives in Dynamically Evaluated Code ('Eval Injection')

Primary references