CVE-2026-17397 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 to 10.0.8.12 and 12.1.0.0 to 12.1.1.2 represents a critical security flaw rooted in server-side request forgery, commonly known as SSRF. This class of vulnerability allows an attacker who has successfully authenticated to the API Connect platform to manipulate or forge HTTP requests originating from the backend system itself. Unlike client-side attacks that target end-user browsers, this exploit leverages the trust relationship between the application and its internal infrastructure, enabling the remote execution of arbitrary network operations under the context of the vulnerable service account. The presence of authentication as a prerequisite indicates that while the attack surface is restricted to legitimate users or compromised credentials, the potential for data exfiltration remains severe due to the elevated privileges typically associated with API management platforms.
From a technical perspective, server-side request forgery occurs when an application accepts a URL or network destination from user input and subsequently makes requests to it without proper validation of the target address. In the context of IBM API Connect, this likely involves endpoints that process external URLs for purposes such as proxying traffic, fetching remote resources, or integrating with third-party services. If these inputs are not rigorously sanitized against internal IP ranges, localhost addresses, or cloud metadata service endpoints, an attacker can craft malicious payloads to direct server-side requests toward sensitive internal systems. These targets often include database servers, configuration management tools, or instance metadata services that store credentials and security tokens. By forcing the API Connect gateway to interact with these internal resources, the attacker bypasses external firewalls and network segmentation controls that would otherwise block direct access from untrusted networks.
The operational impact of this vulnerability centers on unauthorized information disclosure. An authenticated adversary can exploit SSRF to probe internal network topology, identify running services, and extract sensitive data stored in locations not intended for public or even internal API consumption. For instance, accessing cloud provider metadata endpoints such as those found in AWS EC2 or Google Cloud Platform instances could yield temporary security credentials, IAM roles, and other secrets that grant further access into the broader infrastructure. Additionally, SSRF can be used to perform port scanning of internal hosts, potentially revealing vulnerabilities in adjacent systems or facilitating lateral movement within a compromised environment. The severity is compounded by the fact that API Connect serves as a central hub for managing APIs; compromising its integrity may expose data from numerous downstream applications and services connected through the platform.
This vulnerability aligns with CWE-918, which defines Server-Side Request Forgery flaws where web server functionality allows an attacker to cause the server to send requests to arbitrary domains or ports. Furthermore, in terms of offensive security frameworks, this behavior maps directly to MITRE ATT&CK technique T1571, specifically under the subcategory of Non-Standard Ports if internal services are accessed on non-default ports, and generally falls within the broader category of Server-Side Request Forgery used for reconnaissance or data exfiltration. The exploitation path typically involves crafting specific HTTP requests with manipulated host headers or URL parameters that resolve to private IP addresses such as 127.0.0.1, 169.254.169.254, or internal subnet ranges.
Mitigation strategies must focus on strict input validation and network-level controls. Developers should implement a deny-list approach for known dangerous IP ranges, including loopback addresses, link-local addresses, and private network blocks defined in RFC 1918, while also considering allow-listing only the specific external domains required for legitimate functionality. Implementing server-side URL parsing to resolve hostnames before making requests can help detect attempts to redirect traffic to internal IPs via DNS rebinding attacks. Additionally, deploying a web application firewall with rules specifically tuned to block SSRF patterns and restricting outbound network connections from API Connect components to only necessary endpoints will significantly reduce the attack surface. Organizations should also ensure that all instances of IBM API Connect are updated to patched versions where these validation checks have been strengthened by the vendor.