CVE-2026-17359 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 execute arbitrary code due to improper control of generation of code. A user-supplied value can influence code that the product generates, which could lead to code execution.
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Analysis
by VulDB Data Team • 11/07/2026
The vulnerability identified in IBM API Connect versions 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 the improper control of code generation processes within the application's backend infrastructure. This issue is fundamentally classified as an Injection vulnerability, specifically aligning with Common Weakness Enumeration identifier CWE-94 for Improper Control of Generation of Code or CGI, often referred to more broadly under injection flaws where user input directly influences executable logic without adequate sanitization or validation. The core technical flaw lies in the system's failure to sufficiently isolate and validate data provided by users before it is processed as part of a code generation routine. In typical API management platforms like IBM API Connect, various components such as policy engines, script interpreters, or template renderers may dynamically construct commands or scripts based on configuration parameters or request payloads. When these inputs are not rigorously sanitized against special characters, escape sequences, or structural delimiters that define command boundaries, an attacker can inject malicious constructs into the execution context of the application.
The operational impact of this vulnerability is severe due to its potential for Remote Code Execution by a remote authenticated attacker. While authentication serves as a baseline security control, it does not mitigate risks associated with privilege escalation or lateral movement within the internal network architecture once access is granted. An adversary who successfully exploits this flaw can execute arbitrary code on the underlying server hosting the API Connect instance. This capability allows for complete compromise of the system's confidentiality, integrity, and availability. The attacker may install backdoors, exfiltrate sensitive data processed by the APIs managed through the platform, or use the compromised node as a pivot point to attack other systems within the organization's network. Given that API gateways often sit at the perimeter of an enterprise architecture, compromising this component can effectively bypass traditional firewall protections and expose internal microservices and databases directly to external threats if not properly segmented.
From a threat intelligence perspective, this vulnerability maps closely to MITRE ATT&CK techniques related to Command and Scripting Interpreter abuse, specifically T1059 which covers various scripting languages used for execution on target systems. The exploitation path typically involves crafting specific HTTP requests or modifying API configuration payloads that are subsequently interpreted by the vulnerable component. Because the attack requires authentication, it falls under scenarios where insider threats or compromised credentials are leveraged to achieve higher levels of access than initially intended. This highlights a common challenge in enterprise software development where complex features involving dynamic code generation introduce significant surface areas for injection attacks if input validation is not implemented with strict allow-listing principles rather than relying on block-lists which can be easily bypassed using encoding techniques or alternative syntaxes supported by the interpreter.
Mitigation strategies must prioritize immediate patching to the latest available version of IBM API Connect that addresses this specific code generation flaw, as vendor-provided updates typically include rigorous input validation and sandboxing improvements for dynamic execution contexts. In environments where upgrading is not immediately feasible, network-level controls should be implemented to restrict access to the affected components strictly to trusted IP ranges or internal subnets, thereby reducing the attack surface available to potential adversaries. Additionally, implementing Web Application Firewall rules that detect common injection patterns in API payloads can provide a layer of defense-in-depth. Security teams should also enforce strict least-privilege principles for service accounts and application identities running within the platform, ensuring that even if code execution is achieved, the resulting process has minimal permissions to limit lateral movement and system damage. Regular auditing of configuration changes and input validation logic in custom policies or scripts deployed through the API gateway can further reduce the risk of similar injection vulnerabilities arising from developer errors in subsequent updates or custom integrations.