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EUVD-2026-339016

2026-10-05T22:23:21.131345+00:00

EUVD-2026-339016

fkie_cve-2026-46701

2026-10-05T22:23:21.131418+00:00

Network-AI is a TypeScript/Node.js multi-agent orchestrator. Prior to version 5.4.5, the MCP SSE server defaults to an empty secret (`process.env['NETWORK_AI_MCP_SECRET'] ?? ''` at `bin/mcp-server.ts:89`), which causes `_isAuthorized` (`lib/mcp-transport-sse.ts:254`) to return `true` unconditionally for every request — no `Authorization` header is required. Simultaneously, `_handleRequest` sets `Access-Control-Allow-Origin: *` (`lib/mcp-transport-sse.ts:272`) on every response, so a cross-origin browser fetch can read the result without restriction. An unauthenticated attacker who can lure a user to a malicious web page can invoke all 22 exposed MCP tools — including `config_set`, `agent_spawn`, and `blackboard_write` — against a default-configured localhost server. Version 5.4.5 patches the issue.

GHSA-j3vx-cx2r-pvg8 — Network-AI: Unauthenticated Cross-Origin MCP Tool Invocation via Empty Default Secret

2026-10-05T22:23:21.131459+00:00

Affected: npm: network-ai

# Unauthenticated Cross-Origin MCP Tool Invocation via Empty Default Secret

| Field | Value | | ---------------- | ----- | | Repository | Jovancoding/Network-AI | | Affected version | v5.4.4 (commit c12686e181f231cf8d7bcf836a96d78f0f0877ac) |

## Summary

The MCP SSE server defaults to an empty secret (`process.env['NETWORK_AI_MCP_SECRET'] ?? ''` at `bin/mcp-server.ts:89`), which causes `_isAuthorized` (`lib/mcp-transport-sse.ts:254`) to return `true` unconditionally for every request — no `Authorization` header is required. Simultaneously, `_handleRequest` sets `Access-Control-Allow-Origin: *` (`lib/mcp-transport-sse.ts:272`) on every response, so a cross-origin browser fetch can read the result without restriction. An unauthenticated attacker who can lure a user to a malicious web page can invoke all 22 exposed MCP tools — including `config_set`, `agent_spawn`, and `blackboard_write` — against a default-configured localhost server.

## Affected Code

`bin/mcp-server.ts:89` — default secret resolves to empty string, enabling open access

```typescript secret: process.env['NETWORK_AI_MCP_SECRET'] ?? '', ```

`lib/mcp-transport-sse.ts:254` — auth guard short-circuits to `true` when secret is falsy

```typescript private _isAuthorized(req: http.IncomingMessage): boolean { if (!this._opts.secret) return true; const authHeader = req.headers['authorization']; if (typeof authHeader !== 'string') return false; const parts = authHeader.split('…