Description

IBM API Connect 12.1.0.0 through 12.1.1.2 could allow a remote authenticated attacker to obtain sensitive information and bypass security restrictions due to server-side request forgery.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "9.6",
  "pubDate": "2026-11-07T05:18:46.880Z",
  "pubdate": "2026-11-07T05:18:46.880Z",
  "executiveSummary": "IBM API Connect versions 12.1.0.0 through 12.1.1.2 contain a Server-Side Request Forgery (SSRF) vulnerability. This flaw allows a remote authenticated attacker to influence the server to initiate arbitrary requests to unintended destinations, potentially leading to unauthorized data exfiltration and the bypass of existing security controls.\nThe vulnerability resides within the request processing logic of the affected IBM API Connect versions. An attacker, having successfully authenticated to the platform, can manipulate application inputs to force the server to perform requests against internal resources or external systems that are otherwise unreachable by the attacker directly.\nThe risk implications are significant, as successful exploitation may allow for the discovery of internal network infrastructure, interaction with internal services that lack sufficient authentication, or the exfiltration of sensitive configuration metadata and backend API responses. Because the server executes these requests on behalf of the attacker, the traffic originates from a trusted internal source, effectively bypassing perimeter security measures such as firewalls or network access control lists (ACLs). Mitigation requires patching to the vendor-recommended version to ensure input validation and request restriction policies are correctly enforced.",
  "technicalDetails": "The vulnerability is a Server-Side Request Forgery (SSRF) located within the core request handling architecture of IBM API Connect versions 12.1.0.0 through 12.1.1.2. The root cause is improper validation of user-supplied input used to construct outbound requests to backend systems or third-party services. When the API gateway processes a request, it fails to sufficiently sanitize or restrict the destination URL or protocol parameter, allowing an attacker to override the intended target.\nTo exploit this, an attacker must first obtain legitimate authentication credentials for the environment. Once authenticated, the attacker crafts a malicious request by injecting arbitrary resource identifiers into the vulnerable field. When the API Connect server processes this input, it initiates a backend request to the attacker-supplied URI. Because the server acts as a proxy or intermediary, it performs these requests using its own identity and network context.\nThe attack flow follows a structured pattern: 1) The authenticated attacker identifies an endpoint or configuration setting within the management interface or API definition process that triggers a server-side request. 2) The attacker submits a payload targeting an internal resource (e.g., a loopback address 127.0.0.1, internal metadata services, or restricted microservices) or an external malicious server. 3) The application, failing to enforce a strict allow-list of destination hosts or protocols, parses the malicious input. 4) The server performs a GET or POST request to the specified target. 5) The server subsequently returns information retrieved from the target or facilitates an interaction with an otherwise protected internal component.\nThe impact of this SSRF is twofold. First, it enables internal network reconnaissance, allowing the attacker to map the underlying network topology, identify internal IP addresses, and probe for open ports on services not exposed to the public internet. Second, it allows for sensitive information disclosure, as the server may return service responses, configuration files, or internal API tokens that the attacker would not otherwise be able to access. In some scenarios, this can be leveraged to interact with administrative interfaces of internal components, potentially leading to privilege escalation or further exploitation of the backend infrastructure. The attack is particularly dangerous because it originates from the trusted API Connect tier, bypassing common network security controls that typically govern external traffic ingress."
}