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TI-2025-43457 Aliases CVE-2025-71336GHSA-q2xp-j85q-883h

Flowise - Unsandboxed Remote Code Execution via Custom MCP

Priority HIGH 81CWE-78Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
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-78.

Summary

Flowise before 3.0.6 (affected versions 2.2.7-patch.1 and earlier) contains an unsandboxed remote code execution vulnerability in the Custom MCP feature, which is designed to execute OS commands such as launching local MCP servers. Because Flowise's authentication and authorization model is minimal and lacks role-based access control, and the default installation runs without authentication unless FLOWISE_USERNAME and FLOWISE_PASSWORD are set, an attacker can send a crafted JSON payload with the header 'x-request-from: internal' to the /api/v1/node-load-method/customMCP endpoint to execute arbitrary OS commands, resulting in complete compromise of the platform container or server.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.01148 67th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Flowise (Flowise): 3.0.6

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
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 3.0.63.0.6Patch availableCNA
  • Flowise VendorFlowiseAI Affected before 3.0.6 Fixed in 3.0.6 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:flowiseai:flowise:*:*:*:*:*:*:*:*before 3.0.6VulnerableFlowiseAI
  • cpe:2.3:a:flowiseai:flowise:*:*:*:*:*:*:*:* Versions before 3.0.6 Vulnerable ·FlowiseAI

Remediation

  • Fix · CNA Flowise (Flowise) Fixed in 3.0.6

Fixed in the same release

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

  • Release ·

    Flowise 3.0.6

    3 records Highest priority Priority HIGH 3 HIGH

    Other records, highest priority first

    • TI-2025-43455 Flowise - Arbitrary File Access via Missing Chat Flow ID ValidationPriority HIGH 81
    • TI-2025-43445 Flowise - Arbitrary File Read via chatId ParameterPriority HIGH 77
    Show all 3 records →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2025-71336
  2. 2026-10-03 Alias added: GHSA-q2xp-j85q-883h

References

Exploit 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