External risk intelligence

IBM ContextForge MCP Gateway Default Credentials Vulnerability

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2026-78573

The product is a gateway, which is designed to be placed at the network edge to manage traffic. As an internet-facing component, its default configuration is intended to be reachable from public networks.

Halo Surface Signal: 5 out of 5 — more likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

IBM's ContextForge MCP Gateway is vulnerable due to the use of default credentials, which could allow unauthorized remote access to administrative functions. This could present a significant security risk if not addressed.

Default credentials could allow unauthorized admin access.
Protects against unauthorized control of gateway functions.
Confirm if this gateway is in use and requires configuration changes.

Attack Path

How an attacker could exploit the issue

An attacker could exploit this vulnerability by accessing the IBM ContextForge MCP Gateway over the network. Because the gateway uses default credentials, an unauthenticated attacker can easily gain access to administrative functions, potentially leading to a complete compromise of the system.

No prior authentication required.
Default credentials allow access.
Leads to unauthorized administrative control.

Live Threat

Current exploitation, exposure, and threat context

When supported by the advisory, IBM ContextForge MCP Gateway, when configured with default credentials, could allow a remote attacker to gain administrative access. This could potentially expose administrative functions and system control to unauthorized users.

Administrative access to the gateway.
Via network with default credentials.
Unauthorized system control.

Operational Fix

Recommended remediation, mitigation, and detection steps

IBM ContextForge MCP Gateway deployments require immediate attention from platform or infrastructure teams responsible for managing gateway services and their configurations. The primary action is to inventory all instances of this gateway, verify their accessibility, and identify business-critical systems they support to prioritize remediation efforts. This initial assessment will inform the subsequent planning for secure credential management and system updates.

Platform/Infrastructure teams own the issue.
Verify gateway instances and network exposure.
Plan secure credential and system updates.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

Free EASM Trial See How Signal Works

Frequently asked questions

What is the IBM ContextForge MCP Gateway?

IBM ContextForge MCP Gateway acts as a central communication hub designed to facilitate the Model Context Protocol. It bridges various AI models and data sources, serving as a gateway that routes and manages requests across distributed infrastructure. Because it handles sensitive routing and data access, it sits as a critical control point within an organization's AI-enabled software architecture.

What does CWE-1392 mean for CVE-2026-78573?

This vulnerability is classified as CWE-1392, which refers to the use of default credentials. In plain terms, the software is shipped or configured with a pre-set username and password combination that is publicly known or easily guessed. For this CVE, it means the gateway does not force users to create unique, secure passwords upon setup, leaving the administrative interface open to anyone who attempts to log in with those factory-default settings.

How can an attacker trigger this vulnerability?

An attacker triggers this flaw by attempting to log in to the gateway's administrative interface over a network connection using the well-known default credentials. No complex hacking or specialized software is required; the attacker simply provides the expected, standard login information. The vulnerability is not triggered if the administrator has already performed a mandatory password change or if the interface is restricted by network-level access controls.

Is my IBM ContextForge MCP Gateway at high risk?

According to Halo Surface Signal, this software is specifically designed to function as a gateway at the network edge to manage traffic flows. Because its primary purpose is to be reachable from public networks, any instance directly exposed to the internet faces an immediate and significant risk. Systems placed in these positions are much easier for remote attackers to discover and target compared to those residing on private, isolated internal segments.

What should I do to secure my gateway?

Your first step is to perform an inventory of all gateway deployments to identify which instances are currently running. Once you have a list, immediately update the default administrative credentials to strong, unique passwords that are not shared across systems. Additionally, review your network configuration to ensure these management interfaces are not unnecessarily exposed to the public internet, and plan for any necessary system updates provided by IBM.

References

www.ibm.com/support/pages/node/7286834

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.