CVE-2026-17404 in API Connect
Summary
by MITRE • 11/07/2026
IBM API Connect 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2 could allow a remote authenticated attacker to obtain sensitive information due to server-side request forgery.
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Analysis
by VulDB Data Team • 11/07/2026
The vulnerability identified in IBM API Connect versions ranging from 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2 represents a critical server-side request forgery flaw that compromises the integrity of internal network communications. This security defect allows an authenticated remote attacker to manipulate how the application interacts with backend services or external resources, effectively bypassing intended access controls by forcing the server to make requests on behalf of the attacker. The core technical issue stems from insufficient validation of user-supplied input when constructing outbound HTTP requests, a classic manifestation of CWE-918 Server-Side Request Forgery (SSRF). By exploiting this weakness, an adversary can craft malicious payloads that trick the API Connect gateway into fetching data from internal endpoints that are not publicly accessible or authorized for direct client interaction.
The operational impact of this vulnerability is significant because it facilitates unauthorized information disclosure within a typically trusted environment. Since IBM API Connect serves as a central hub for managing and securing APIs, compromising its ability to control outbound requests can lead to the exposure of sensitive configuration data, internal service credentials, or proprietary business logic stored on backend systems. An attacker who has obtained valid authentication credentials through phishing, credential stuffing, or other means can leverage this SSRF flaw to probe internal network segments that are otherwise isolated from external access. This capability effectively neutralizes perimeter defenses such as firewalls and intrusion detection systems, which typically do not inspect traffic originating from trusted application servers for malicious intent.
From a threat modeling perspective, this vulnerability aligns with the MITRE ATT&CK technique T1557, specifically Adversary-in-the-Middle or Lateral Tool Transfer variants that utilize SSRF to pivot across network boundaries. The attacker uses the compromised API Connect instance as a proxy to access internal resources, thereby expanding their foothold within the organization's infrastructure. This is particularly dangerous in microservices architectures where services communicate over private networks relying on implicit trust relationships. If an internal service responds with sensitive data such as database connection strings or authentication tokens, these secrets can be exfiltrated back through the API Connect response channel to the attacker-controlled server.
Mitigation strategies must focus on both immediate remediation and long-term architectural hardening. The primary defense is to apply the vendor-provided patches that address the input validation logic within the affected versions of IBM API Connect. Organizations should prioritize updating all instances running version 10.0.8.x up to 10.0.8.12 and 12.1.0.x up to 12.1.1.2 to their respective latest secure releases. In addition to patching, implementing strict allow-lists for outbound connections is crucial. The API gateway should be configured to only permit requests to known, trusted internal endpoints rather than accepting arbitrary hostnames or IP addresses from user input. Furthermore, deploying network-level controls such as egress filtering and ensuring that backend services do not respond with sensitive data in standard HTTP responses can reduce the blast radius of any successful exploitation attempt. Continuous monitoring for anomalous outbound traffic patterns originating from API Connect nodes will also aid in early detection of potential SSRF abuse attempts.