Live › vulnerability › GHSA-q2xp-j85q-883h
Flowise's Custom MCP feature launches local processes from user-supplied JSON without sandboxing. A crafted request to the node-load-method endpoint with a special header lets an attacker run arbitrary OS commands on the server or container.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-11-03 17:36 UTC. All times on this page are UTC.
Teams running self-hosted Flowise at version 2.2.7-patch.1 or earlier, or any 3.x below 3.0.6, are exposed. The default installation has no authentication unless the username and password variables are set, so an internet-reachable instance is the main risk. Instances behind login with the variables set and not exposed publicly carry less risk.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| flowise | npm | >= 2.2.7-patch.1, < 3.0.6 | 3.0.6 |
npm ls flowise or the image tag, and compare it to the affected range >= 2.2.7-patch.1, < 3.0.6.FLOWISE_USERNAME and FLOWISE_PASSWORD are set in the environment; unset means no login is required.flowise moves to 3.0.6 or later.Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
This advisory has been withdrawn because it is a duplicate of GHSA-6933-jpx5-q87q. This link is maintained to preserve external references.
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.
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