CVE-2026-73601

CRITICAL

Flowise before 3.1.3 Remote Code Execution via Custom MCP

Title source: CVE List
STIX 2.1 vulnerability

Record summary

CVE-2026-73601 has a selected CVSS score of 9.0 (critical).

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.

Description source: CVE List

Affected products and versions

1
ProductSourceVersion range

Flowise

Browse FlowiseAI / Flowise

Default status: unaffected

CVE ListBefore 3.1.3affected
3.1.3unaffected

References

3