External risk intelligence

IBM API Connect SSRF Vulnerability Allows Sensitive Information Disclosure

CVE advisorySeverity: CRITICAL (CVSS 9.9)

CVE-2026-17298

IBM API Connect is an enterprise API management platform specifically designed to manage, secure, and expose APIs to the public internet. As an edge-facing gateway and API management product, it is commonly deployed to serve traffic from external networks, making its management and API endpoints highly likely to be reachable from the internet.

Server-Side Request Forgery

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

This vulnerability affects IBM API Connect, a platform used for managing APIs. It could allow an attacker to access sensitive information by making the system send requests to unintended locations. The primary concern is to confirm if your specific deployment of API Connect is exposed and potentially impacted.

Allows attackers to access sensitive information.
Important for protecting API management systems.
Confirm relevance and exposure of your systems.

Attack Path

How an attacker could exploit the issue

An attacker with valid credentials could exploit this vulnerability by sending a specially crafted request to the IBM API Connect system. This could lead to the attacker accessing or modifying sensitive information on the server.

Authenticated access to the system is required.
A crafted server-side request triggers the flaw.
Sensitive information disclosure and system compromise.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow a remote authenticated attacker to access sensitive information through server-side request forgery. The impact depends on the attacker's access level and the specific configuration of the IBM API Connect instance.

Sensitive information disclosure.
Exploits server-side request forgery.
Potential for unauthorized access.

Operational Fix

Recommended remediation, mitigation, and detection steps

IBM API Connect, an enterprise API management platform, is likely managed by platform or infrastructure teams, with ultimate accountability resting with application owners. The first practical step is to inventory all deployed instances of IBM API Connect, confirm external reachability and business criticality, and then engage the accountable owner to assess exposure and plan remediation activities.

Platform and application owners should address.
Verify external reachability and business criticality.
Plan remediation based on assessed risk.

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 API Connect?

IBM API Connect is an enterprise-grade platform that functions as an API gateway and management system. Organizations use it to create, run, manage, and secure APIs, often serving as the critical interface that bridges internal backend services with external applications or the public internet.

How does CVE-2026-17298 work?

This vulnerability is classified as Server-Side Request Forgery (CWE-918). It occurs when a system can be manipulated into making unauthorized requests to internal or external resources on behalf of an attacker. By sending a crafted request to the API gateway, an attacker can trick the server into accessing data or services it should not reach, leading to potential information disclosure.

What triggers this vulnerability?

To trigger this flaw, an attacker must have valid authentication credentials to the system. Once authenticated, they send a specifically crafted request designed to exploit how the gateway handles outbound connections. It is important to note that unauthenticated users cannot trigger this specific bug; it requires an established session with the platform.

Is my IBM API Connect instance at risk?

According to Halo Surface Signal, this software is frequently deployed as an edge-facing gateway intended to handle traffic from the public internet, making it highly likely that your management or API endpoints are reachable externally. If your instance is exposed to the internet, it faces a higher level of risk compared to internal-only deployments, as unauthorized or compromised authenticated accounts could leverage this flaw from outside your network.

What should I do if I use this software?

Begin by inventorying all deployed instances of IBM API Connect to establish a complete footprint. Verify which instances are reachable from the internet and prioritize those for review. Coordinate with the platform or application owners responsible for these systems to assess your specific configuration and follow official vendor guidance to plan for security updates.

References

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.