External risk intelligence

Network-AI MCP SSE Server Unauthenticated Tool Invocation Vulnerability

CVE advisorySeverity: CRITICAL (CVSS 9.1)

CVE-2026-48814

A critical vulnerability in Network-AI, a TypeScript/Node.js orchestrator, allows unauthenticated users to invoke administrative tools. This could permit unauthorized control over the system by any network-accessible caller. Confirm relevance and assess exposure.

Missing Authentication

Halo Surface Signal

Likely · external exposure

4Halo Surface Signal

The vulnerability affects a network-based multi-agent orchestrator that defaults to unauthenticated access and can be bound to non-loopback interfaces. As an orchestrator designed to expose tools via an SSE server, it is commonly deployed to facilitate remote or distributed agent communication, making it highly probable to be exposed as an API or service endpoint in real-world deployments.

Horizon Alert

Summary of the vulnerability and why it matters

A security flaw in Network-AI, a TypeScript/Node.js orchestrator, allows unauthorized users to run administrative commands without any authentication. This critical vulnerability could allow attackers to gain significant control over the system.

  • Unauthenticated access to critical system functions.
  • High impact on systems using this orchestrator.
  • Confirm relevance and assess exposure level.

Attack Path

How an attacker could exploit the issue

An attacker could reach the vulnerable component by sending unauthenticated requests to the MCP SSE server, as it defaults to an empty secret and performs insufficient authorization checks. This exposure allows any caller, including those from outside a browser or via server-side request forgery, to invoke all available tools without providing any credentials. When successfully triggered, this can lead to significant unauthorized control over the orchestrator's functions.

  • Unauthenticated network access is required.
  • Invoking MCP tools with an empty secret.
  • Complete unauthorized tool execution.

Live Threat

Current exploitation, exposure, and threat context

The Network-AI orchestrator, when configured to listen on a non-loopback address, could allow unauthenticated callers to invoke all its tools. This means that any system capable of reaching the orchestrator over the network could potentially execute its functions, such as modifying configurations or spawning agents, without any form of credential verification.

  • Unauthenticated invocation of system tools.
  • Network-accessible, unauthenticated SSE server.
  • Unauthorized system configuration changes.

Operational Fix

Recommended remediation, mitigation, and detection steps

The Network-AI orchestrator's default configuration allows unauthenticated invocation of all its tools via the MCP SSE server. Application owners or platform teams responsible for this orchestrator should first identify all instances, assess their reachability and criticality, and then plan remediation. Coordination with the vendor for updates or configuration hardening is essential.

  • Application owners and platform teams.
  • Confirm instance reachability and criticality.
  • Plan configuration hardening and updates.

Supplementary metadata

PCI scan relevance

Yes

CVE-2026-48814 — Halo PCI Relevance: Yes. Under typical PCI ASV external scan criteria, this issue may be flagged for scan prioritization.

This vulnerability allows unauthenticated invocation of tool functions, posing a significant security risk.

Scan-prioritization guidance only—not a PCI DSS certification or ASV attestation.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

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Frequently asked questions

What is Network-AI?

Network-AI is a multi-agent orchestrator built with TypeScript and Node.js. It uses a Model Context Protocol (MCP) server to provide a central environment where different software agents can communicate and execute automated tasks, such as spawning new agents or managing system configurations.

What does CWE-306 mean for CVE-2026-48814?

CWE-306 refers to 'Missing Authentication for Critical Function.' In this context, it means the software performs sensitive actions—like executing administrative tools—without verifying who is making the request. Because the server defaults to an empty secret, it treats any incoming connection as authorized.

How can an attacker trigger this vulnerability?

An attacker triggers this by sending unauthorized network requests directly to the MCP SSE server. While browser-based cross-origin restrictions were tightened in previous updates, those protections do not stop non-browser callers. Any system or script that can reach the server over the network can bypass the empty secret check and execute tools.

Is my deployment at risk according to Halo Surface Signal?

Halo Surface Signal indicates this is a high-risk scenario because Network-AI is often deployed as a network-accessible service to support distributed agents. If your instance is configured to listen on any network interface rather than just the local loopback, it is likely reachable and exposed to unauthorized tool invocation.

What should I do to secure my system?

First, identify all active instances of Network-AI in your environment and determine if they are reachable over the network. Once mapped, update your software to version 5.7.2 or later to apply the fix. If you cannot update immediately, ensure the service is restricted to local-only connections to prevent remote access.

References

Sources and related resources

Primary sources: NVD, CVE.org.

NVDPublished