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CVE-2026-73601

9.0 critical SSVC exploitation: none Analyzed
NVD · CVE.org

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.

Fix

Patch, vendor advisory and mitigation references on NVD 1

Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.

Change history 1

  1. First seenCVSS 9.0 · flowiseaiNVD modified 2026-10-23 18:10

Affected (CPE criteria) 1

  • cpe:2.3:a:flowiseai:flowise:*:*:*:*:*:*:*:*

References 2