GHSA-35w5-pcw4-jx94

## Summary The SSE (Server-Sent Events) server in `src/praisonai-agents/praisonaiagents/server/server.py` exposes a `/publish` endpoint that broadcasts arbitrary messages to all connected clients without any authentication. The `ServerConfig` dataclass (line 24) defines an `auth_token` field, but this token is never validated in the `/publish` or `/events` request handlers. Any attacker with access to the SSE server port can inject arbitrary events into the SSE stream visible to all connected clients, or use `/info` to leak server configuration including connected client count. ## Details **Vulnerable code (lines 164–180):** ```python async def publish(request): try: data = await request.json() event_type = data.get("type", "message") event_data = data.get("data", {}) self.broadcast(event_type, event_data) return JSONResponse({ "success": True, "clients": len(self._clients), }) ``` The `auth_token` field in `ServerConfig` (line 31): ```python @dataclass class ServerConfig: ... auth_token: Optional[str] = None ``` This `auth_token` is **never referenced** in any request handler. The `/publish` endpoint processes any POST request regardless of authentication headers. The `/info` endpoint (line 182) also has no auth and returns server configuration including `self.config.to_dict()`. **Routes registration (lines 190–194):** ```python routes = [ Route("/health", health, methods=["GET"]), Route("/events", events, methods=["GET"]), Route("/publish", publish, methods=["POST"]), Route("/info", info, methods=["GET"]), ] ``` No authentication middleware or token validation is applied to any route. ## PoC **Setup:** Start the SSE server (default port 8765). This is the documented server mode for streaming agent events. **Positive trigger — unauthenticated event injection:** ```bash # From any network-reachable host: curl -X POST http://localhost:8765/publish \ -H "C