CVE-2026-46701
CVE-2026-46701 · Network-AI: Unauthenticated Cross-Origin MCP Tool Invocation via Empty Default Secret
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 7.6 · High · EPSS 0.2% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
network-ai
- Versions
- < 5.4.5: Affected
No fix published
network-ai npm
- Affected ranges
- SEMVER: < 5.4.5
Update to 5.4.5