CVE-2026-17307 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 broken object-level authorization.
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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 through 12.1.1.2 represents a critical failure in access control mechanisms, specifically categorized under the class of broken object-level authorization. This type of flaw occurs when an application verifies that a user is authenticated but fails to adequately verify whether that specific user has permission to perform actions on or view data associated with particular objects within the system. In the context of API Connect, which serves as a platform for managing and securing APIs, such a deficiency allows remote attackers who have successfully obtained valid authentication credentials to manipulate object identifiers in their requests. By altering parameters such as resource IDs or tenant identifiers that are passed directly from client inputs without sufficient server-side validation against the authenticated user's actual permissions, an attacker can access data belonging to other users or tenants within the same deployment environment.
From a technical perspective, this vulnerability stems from insufficient separation between authentication and authorization processes during API request handling. The system correctly validates the identity of the requester but neglects to enforce strict checks on whether that identity is authorized to interact with the specific resource being requested. This oversight enables horizontal privilege escalation where an attacker can traverse across different user accounts or organizational units within a multi-tenant architecture. The impact extends beyond simple data leakage; it compromises the integrity and confidentiality guarantees provided by the API gateway, potentially exposing sensitive business logic, customer personal information, proprietary configurations, or internal service endpoints that were intended to remain isolated per tenant or user session.
The operational impact of this vulnerability is significant for organizations relying on IBM API Connect to secure their digital assets. Successful exploitation allows a remote authenticated attacker to exfiltrate confidential data without needing elevated privileges or exploiting additional software bugs. This can lead to regulatory non-compliance, particularly under frameworks such as GDPR, HIPAA, or PCI-DSS, which mandate strict access controls and data protection measures. Furthermore, the exposure of internal API structures may facilitate further attacks by providing attackers with valuable intelligence about backend services, authentication flows, and system architecture, thereby lowering the barrier for subsequent exploitation attempts against other components in the enterprise network.
To mitigate this risk, organizations must immediately apply the vendor-provided patches that address these specific version ranges. Beyond patching, it is essential to implement defense-in-depth strategies such as enforcing strict input validation on all object identifiers and ensuring that authorization checks are performed consistently for every API endpoint regardless of authentication status. Security teams should also review logging mechanisms to detect anomalous patterns indicative of IDOR attempts, such as rapid sequential access requests with varying resource IDs from a single authenticated session. Aligning remediation efforts with industry standards like CWE-639, which covers authorization bypass through manipulation of object references, and mapping the attack vector to MITRE ATT&CK technique T1078, specifically valid accounts used for lateral movement or data exfiltration, will help in building a more resilient security posture against similar access control failures.