External risk intelligence

IBM API Connect Server-Side Request Forgery Vulnerability

CVE advisorySeverity: CRITICAL (CVSS 9.3)

CVE-2026-17344

IBM API Connect is an enterprise API gateway and management platform designed to be publicly accessible to handle traffic between external clients and internal services. As a product meant to expose endpoints and manage API traffic, it typically sits at the network edge and is frequently exposed to the internet.

Server-Side Request Forgery

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

This advisory highlights a critical vulnerability in IBM API Connect software that could allow unauthorized access to sensitive information. The flaw, a type of server-side request forgery, enables unauthenticated users to trick the service into sending requests to unintended locations, potentially exposing internal systems or data. The primary concern is to confirm if your organization utilizes this specific software and assess the exposure.

Flaw in API Connect allows unauthorized data access.
Exposes sensitive information through unintended requests.
Confirm relevance and assess potential exposure.

Attack Path

How an attacker could exploit the issue

An attacker could exploit this vulnerability by sending specially crafted requests to an unauthenticated endpoint on IBM API Connect. This could trick the API gateway into making requests on the attacker's behalf to internal or external systems it has access to, potentially revealing sensitive information or allowing unauthorized access to other resources.

No authentication required for access.
Unauthenticated endpoint triggers request forgery.
Sensitive information disclosure or unauthorized access.

Live Threat

Current exploitation, exposure, and threat context

This vulnerability could allow an unauthenticated remote attacker to trick an API Connect service into making requests to unintended destinations, potentially exposing sensitive information. This occurs when the affected service is reachable without authentication and is susceptible to server-side request forgery when processing requests.

Sensitive information disclosure.
Unauthenticated requests to unintended destinations.
Compromise of service integrity and data confidentiality.

Operational Fix

Recommended remediation, mitigation, and detection steps

IBM API Connect, as an API gateway and management platform, is likely managed by a combination of platform and network/security teams due to its role at the network edge. The immediate first step is to identify all instances of the affected technology, confirm their reachability and business criticality, and then assign ownership to an accountable party to initiate a risk-based remediation plan.

Platform and network/security teams own issue.
Verify affected instances and business criticality.
Plan remediation based on verified 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 platform used to manage, secure, and monitor application programming interfaces. It acts as a gateway that sits between external applications and internal services, handling requests, enforcing security policies, and managing traffic flow across complex digital ecosystems.

What does Server-Side Request Forgery mean for CVE-2026-17344?

This vulnerability is classified as CWE-918: Server-Side Request Forgery. It means an attacker can manipulate the software into sending requests to locations it shouldn't access. Instead of the software only communicating with intended destinations, it is tricked into reaching out to internal or unauthorized systems, potentially leaking data.

How is this vulnerability triggered?

An attacker triggers this by sending a specially crafted request to an endpoint on the software that does not require authentication. If the endpoint is accessible, it processes the malicious request and directs the server to contact unintended destinations. The bug does not trigger if the request requires valid authentication, as the gateway would reject the malicious input before processing.

Is my IBM API Connect instance at risk?

Halo Surface Signal indicates this product is often deployed at the network edge to manage public-facing API traffic, making it a high-priority concern. If your instance is reachable from the internet, it is considered externally exposed and faces a higher risk of being targeted by unauthorized remote requests compared to services isolated within an internal network.

What should I do first to address this?

Start by identifying all deployed instances of IBM API Connect within your environment and documenting their network reachability. Once identified, coordinate with the platform and security teams to confirm which instances are currently active and critical to business operations, then establish an ownership plan to manage the risk.

References

www.ibm.com/support/pages/node/7295635

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.