CVE-2026-17362 in API Connect
Summary
by MITRE • 11/07/2026
IBM API Connect 12.1.0.0 through 12.1.1.2 could allow a remote attacker to create, modify, or delete tenants due to missing authorization.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 11/07/2026
The vulnerability identified in IBM API Connect versions 12.1.0.0 through 12.1.1.2 represents a critical failure in access control mechanisms within the platform's administrative interface. This flaw allows an unauthenticated or unauthorized remote attacker to perform sensitive operations such as creating, modifying, or deleting tenants without proper verification of their permissions. In multi-tenant architectures like API Connect, tenant isolation is fundamental to maintaining data integrity and security boundaries between different organizations or departments using the same infrastructure. The absence of robust authorization checks means that any user with network access to the affected endpoints can manipulate these core structural elements of the system.
From a technical perspective, this issue stems from insufficient validation of session tokens or authentication credentials before processing requests related to tenant management APIs. When an attacker sends a crafted HTTP request targeting specific administrative endpoints, the application fails to verify whether the requester possesses the necessary privileges to execute that action. This lack of server-side enforcement enables privilege escalation scenarios where lower-privileged users can assume higher-level roles effectively bypassing security controls designed to restrict such actions. The vulnerability aligns with CWE-284 Improper Access Control and specifically relates to CWE-862 Missing Authorization, indicating a fundamental gap in the application's logic for verifying user rights against requested operations.
The operational impact of this vulnerability is severe due to its potential to compromise the entire multi-tenant environment. An attacker who successfully exploits this flaw can create new tenants to establish persistent backdoors or isolate malicious activities from legitimate traffic. They may also modify existing tenant configurations to alter access policies, redirect API gateways, or inject malicious code into shared resources. Most critically, the ability to delete tenants results in complete data loss and service disruption for affected organizations relying on those specific instances of the platform. This level of control effectively grants an attacker administrative dominance over the infrastructure, leading to potential confidentiality breaches, integrity violations, and availability disruptions across all connected services.
This type of vulnerability is often associated with attack patterns found in MITRE ATT&CK framework under techniques such as T1078 Valid Accounts if existing credentials are misused or T1496 Resource Hijacking when resources are consumed for malicious purposes. It also reflects common weaknesses seen in web application security where RESTful API endpoints lack proper middleware checks for role-based access control (RBAC). The simplicity of exploitation makes this a high-risk issue, as automated tools can easily scan for these unprotected endpoints and execute payloads to demonstrate the severity of the flaw.
To mitigate this risk, organizations running affected versions must immediately apply the latest security patches provided by IBM that address the authorization logic in tenant management APIs. Until patching is feasible, network-level controls should be implemented to restrict access to administrative interfaces only from trusted IP addresses using firewalls or VPNs. Additionally, implementing strict input validation and enforcing principle of least privilege across all user accounts can reduce the attack surface. Security teams should also monitor logs for unusual patterns in tenant creation or deletion events which may indicate ongoing exploitation attempts. Regular audits of API endpoint permissions are essential to ensure that future updates do not reintroduce similar access control weaknesses.