External risk intelligence

IBM ContextForge Server-Side Request Forgery Vulnerability

CVE advisorySeverity: CRITICAL (CVSS 9.6)

CVE-2026-77822

The product is identified as a gateway, which is a network device typically deployed at the edge of a network to manage traffic. As an internet-facing gateway service, it is commonly positioned to receive and process remote network requests.

Server-Side Request Forgery

Ibm Contextforge

1.0.8 and earlier

Halo Surface Signal: 4 out of 5 — likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

An IBM security advisory highlights a critical vulnerability in IBM ContextForge MCP Gateway. This flaw could permit a remote, authenticated attacker to access sensitive information by exploiting a server-side request forgery weakness related to DNS rebinding. While the impact is significant, the primary concern for leadership at this stage is to confirm if this specific IBM product is in use within the organization's environment.

Attackers could steal sensitive information remotely.
This IBM product is a network gateway.
Confirm if IBM ContextForge MCP Gateway is used.

Attack Path

How an attacker could exploit the issue

An attacker with valid credentials could exploit this vulnerability by leveraging DNS rebinding. This technique allows them to trick the gateway into making requests to internal resources that it should not normally have access to, potentially exposing sensitive information from those internal systems.

Requires authenticated access.
Triggers via DNS rebinding.
Risk of sensitive data exposure.

Live Threat

Current exploitation, exposure, and threat context

IBM ContextForge MCP Gateway, when accessed by an authenticated user and when supported by DNS rebinding, could expose sensitive information by making unauthorized requests to internal or external systems.

Sensitive system information could be exposed.
An attacker could exploit DNS rebinding.
Unauthorized access to internal resources may occur.

Operational Fix

Recommended remediation, mitigation, and detection steps

IBM ContextForge MCP Gateway, acting as a network gateway, is likely managed by platform or infrastructure teams who must first identify all instances. The initial step is to confirm if these instances are internet-facing, business-critical, and who owns them before planning remediation.

Platform or infrastructure teams own this.
Verify internet-facing and business-critical instances.
Plan remediation based on verified exposure.

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.

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Frequently asked questions

What is IBM ContextForge MCP Gateway?

IBM ContextForge is a software platform designed to manage and route communication within complex application environments. Acting as an MCP (Model Context Protocol) gateway, it serves as a central hub that bridges different services, handling requests and data flow to ensure components can talk to one another effectively.

What does Server-Side Request Forgery mean for CVE-2026-77822?

This vulnerability, classified as CWE-918, occurs when an application is tricked into sending requests to unintended locations. In this case, the gateway is manipulated to look at internal resources it should not access. Because the gateway performs the request, it can bypass local security controls to fetch sensitive data.

How does DNS rebinding trigger this vulnerability?

DNS rebinding is the method an attacker uses to confuse the gateway. By controlling a malicious domain, they cause the gateway to resolve an address to a safe location initially, then quickly switch it to an internal system. It does not trigger if the gateway is configured to strictly validate or restrict the hostnames it is allowed to contact.

Do I need to worry if my gateway is internal?

Yes, but your priority level may differ. Halo Surface Signal notes this product acts as a network gateway, typically positioned to manage traffic flows. While internet-facing instances are the primary concern because they are reachable from outside, any compromised internal user account could still leverage this flaw to probe other sensitive internal systems.

What should I do first to address CVE-2026-77822?

Begin by auditing your infrastructure to locate all active installations of IBM ContextForge. Once identified, categorize these instances by their network placement and business role. Confirm whether specific instances are exposed to the internet or handle highly sensitive internal traffic, then prioritize those for patching as recommended by your vendor.

References

www.ibm.com/support/pages/node/7286055

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.