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CVE-2026-73601

Flowise before 3.1.3 Remote Code Execution via Custom MCP PUBLISHED

Description (CNA)

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 (CNA)

Vendor / productVersions
FlowiseAI / Flowiseaffected 0 before 3.1.3; unaffected 3.1.3
FlowiseAI / Flowiseaffected 0 before 3.1.3; unaffected 3.1.3

CWE

CWE-95

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.