Read the docs
TI-2026-51685 Aliases CVE-2026-73601GHSA-m2vg-4724-xj8g

Flowise before 3.1.3 Remote Code Execution via Custom MCP

Priority MEDIUM 43CWE-95Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Attack requirements
Present
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-95.

Summary

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.01099 65th percentileScored 2026-11-07
Fix Fixed Flowise (FlowiseAI): 3.1.3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
FlowiseAIFlowisebefore 3.1.33.1.3Patch availableCNA
FlowiseAIFlowisebefore 3.1.33.1.3Patch availableCNA
  • Flowise VendorFlowiseAI Affected before 3.1.3 Fixed in 3.1.3 Patch available CNA
  • Flowise VendorFlowiseAI Affected before 3.1.3 Fixed in 3.1.3 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:flowiseai:flowise:*:*:*:*:*:*:*:*before 3.1.3VulnerableFlowiseAI
  • cpe:2.3:a:flowiseai:flowise:*:*:*:*:*:*:*:* Versions before 3.1.3 Vulnerable ·FlowiseAI

Remediation

  • Fix · CNA Flowise (FlowiseAI) Fixed in 3.1.3
  • Fix · CNA Flowise (FlowiseAI) Fixed in 3.1.3

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    FlowiseAI Flowise 3.1.3

    9 records Highest priority Priority HIGH 4 HIGH, 5 MEDIUM

    Other records, highest priority first

    • TI-2026-51595 Flowise before 3.1.3 Sandbox Escape via PuppeteerPriority HIGH 82
    • TI-2026-51599 Flowise before 3.1.3 Prompt Injection RCE via CSV AgentPriority HIGH 80
    • TI-2026-51598 Flowise before 3.1.3 Code Injection via CSV Agent customReadCSVPriority HIGH 74
    Show all 9 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-73601
  2. 2026-10-03 Alias added: GHSA-m2vg-4724-xj8g

References

Advisory 1

  • TI-2025-37059 Flowise has Remote Code Execution vulnerability CVSS 3.1CRITICAL 10.0
  • TI-2025-36193 Flowise Cloud and Local Deployments have Unauthenticated Password Reset Token Disclosure that Leads to Account Takeover CVSS 3.1CRITICAL 9.8
  • TI-2025-08190 Unsupervised OS command execution leads to remote code execution by unauthenticated network attackers CVSS 3.1CRITICAL 9.8
  • TI-2026-51595 Flowise before 3.1.3 Sandbox Escape via Puppeteer CVSS 4.0CRITICAL 9.4
  • TI-2026-49250 Flowise: CSV Agent Prompt Injection Remote Code Execution Vulnerability CVSS 4.0CRITICAL 9.5
  • TI-2025-43459 Flowise through 2.2.7 - Arbitrary File Write to Remote Code Execution via document-store API CVSS 4.0CRITICAL 10.0
See all 127 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences