CVE-2026-17296 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 security flaw rooted in server-side request forgery, commonly referred to as SSRF. This class of vulnerability allows an attacker who has successfully authenticated to the application to manipulate the backend system into making HTTP requests to arbitrary destinations under the control of the attacker or within the internal network infrastructure. The core technical issue lies in the insufficient validation and sanitization of user-supplied input that is subsequently used by the server to construct outbound web requests. When a legitimate, authenticated user interacts with specific API endpoints or management interfaces within IBM API Connect, the system may accept URLs or hostnames provided as parameters without adequately verifying whether these targets are internal services, metadata endpoints, or other sensitive resources that should not be accessible from external-facing components.
From an operational perspective, this flaw enables a remote authenticated attacker to bypass network-level access controls and firewalls by leveraging the application server itself as a proxy. Because the requests originate from within the trusted environment where IBM API Connect is deployed, they can reach internal services such as database servers, configuration management systems, cloud metadata endpoints like AWS EC2 instance metadata service or Azure managed identity endpoints, and other microservices that are not directly exposed to the public internet but are accessible via internal network paths. The primary impact of this vulnerability is the unauthorized disclosure of sensitive information. An attacker can exploit SSRF to retrieve credentials, session tokens, configuration files, or proprietary data stored on these internal resources, effectively compromising the confidentiality integrity of the entire platform environment even without direct access to those backend systems.
This vulnerability aligns with CWE-918, which defines Server-Side Request Forgery as a weakness where a web server retrieves a specified resource from a user-supplied URL, potentially allowing attackers to probe internal networks or bypass authentication controls on back-end services. Furthermore, in the context of the MITRE ATT&CK framework, this behavior maps directly to T1598, specifically Stolen Web Credentials and Phishing for Information within Intranets, as well as techniques related to network reconnaissance such as Active Scanning when used to map internal service topology. The exploitation chain typically involves an authenticated user crafting a malicious request that directs the API Connect server to fetch data from a target URL controlled by the attacker or pointing to sensitive internal endpoints, with the response being returned back to the original requester through the application interface.
Mitigation strategies for this vulnerability require both immediate remediation and long-term architectural improvements. The most effective solution is to apply the official security patches provided by IBM that address these specific version ranges, ensuring that input validation logic is hardened against SSRF patterns. In environments where patching may be delayed or impossible due to legacy constraints, network segmentation becomes critical; administrators should implement strict egress filtering rules on the API Connect servers to restrict outbound connections only to explicitly whitelisted domains and IP addresses, thereby blocking access to internal metadata services and private subnets. Additionally, deploying a web application firewall with SSRF detection capabilities can provide an additional layer of defense by inspecting outgoing requests for suspicious patterns such as attempts to access cloud provider metadata IPs or localhost references. Input validation should also be enforced at the API gateway level to reject any user-supplied URLs that do not conform to expected domain allowlists, ensuring that only legitimate external resources are fetched during normal operations.