CVE-2026-17381 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 improper authorization validation using user-controlled keys.
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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 flaw in the application's access control mechanisms, specifically classified under CWE-269 Improper Privilege Management or more precisely CWE-862 Missing Authorization. This security defect allows remote authenticated attackers to bypass intended restrictions and access sensitive information that should be restricted based on their assigned roles or permissions. The core technical issue stems from improper authorization validation where the system fails to adequately verify whether a user has the necessary privileges for specific resources before processing requests involving user-controlled keys.
In typical API gateway architectures like IBM API Connect, authentication verifies the identity of the requester while authorization determines what actions that identity is permitted to perform. In this flawed implementation, the application relies on user-supplied input parameters, specifically keys provided within request payloads or headers, without sufficiently cross-referencing these inputs against the authenticated user's actual permission set. This oversight creates a scenario where an attacker who has valid credentials for one account can manipulate key identifiers in their requests to access data associated with other accounts or higher-privileged entities. The vulnerability essentially enables horizontal privilege escalation among peers and potentially vertical privilege escalation if administrative keys are involved, depending on the specific implementation details of how these user-controlled keys map to backend resources.
The operational impact of this vulnerability is significant for organizations relying on IBM API Connect as a central hub for their digital integrations. Since the attack requires only authenticated access, it lowers the barrier for exploitation considerably compared to unauthenticated attacks. An attacker with low-level credentials could potentially exfiltrate sensitive business data, customer personally identifiable information, or proprietary configuration details by simply altering key parameters in API calls. This breach of confidentiality undermines trust in the platform and can lead to severe regulatory compliance violations under frameworks such as GDPR, HIPAA, or PCI-DSS, depending on the nature of the exposed data. Furthermore, if these keys control access to critical business logic or financial transactions, the integrity of those processes could also be compromised.
From a threat modeling perspective aligned with MITRE ATT&CK techniques, this vulnerability facilitates Data Staging and Collection via API endpoints. The attacker leverages valid credentials to move laterally within the application's data landscape without triggering typical intrusion detection alerts associated with brute-force or injection attacks. Because the authentication layer is successfully passed, traditional perimeter defenses may not flag the activity as malicious unless behavioral analytics specifically monitor for anomalous access patterns related to resource ownership.
To mitigate this risk, organizations must immediately apply the latest patches provided by IBM that address these specific version ranges. Beyond patching, it is crucial to implement defense-in-depth strategies such as strict input validation and canonicalization of all user-controlled keys before they are processed by authorization logic. Developers should ensure that every API endpoint performs a server-side check verifying that the authenticated session owner has explicit permission for the resource identified by the provided key. Additionally, implementing robust logging and monitoring solutions can help detect unusual access patterns where users frequently request resources outside their expected scope of operation. Regular security audits focusing on broken object level authorization flaws are recommended to identify similar weaknesses across other integrated systems within the enterprise environment.