CVE-2026-17376 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 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2 represents a critical failure in access control mechanisms, specifically categorized as broken object-level authorization. This class of vulnerability allows an attacker who has already authenticated to the system to manipulate or exploit flaws that restrict direct access to objects based on their identity. In this context, the application fails to properly verify whether the authenticated user is authorized to perform actions on specific API resources or data objects they are attempting to interact with. The core technical flaw lies in the server-side logic which relies insufficiently on session state or token validation when processing requests for individual resource instances rather than collection-level endpoints.
From a technical perspective, this weakness enables an attacker to modify parameters within HTTP requests, such as changing unique identifiers associated with specific data records, API keys, or configuration objects belonging to other tenants or users. Because the application does not enforce strict ownership checks before fulfilling these requests, the system processes actions intended for one entity using credentials of another authenticated user. This bypasses standard authorization controls and allows the attacker to read sensitive information that should remain confidential. The attack vector is remote and requires authentication, meaning the threat actor must first compromise valid credentials or exploit a separate vulnerability to gain initial access before leveraging this flaw to escalate privileges regarding data visibility.
The operational impact of this vulnerability is significant for organizations relying on IBM API Connect for managing their digital APIs and microservices architecture. Successful exploitation can lead to unauthorized disclosure of sensitive business information, including customer personal identifiable information, proprietary intellectual property, or internal system configurations. This breach of confidentiality undermines the integrity of multi-tenant environments where data isolation between different clients or departments is paramount. Furthermore, exposure of such sensitive data can result in severe regulatory non-compliance with standards like GDPR, HIPAA, or PCI-DSS, leading to substantial financial penalties and reputational damage for the affected organization.
This vulnerability aligns closely with CWE-639, which describes authorization issues related to indirect object references where a user is provided an identifier that can be manipulated to access another resource. In terms of offensive security frameworks, this behavior maps directly to MITRE ATT&CK technique T1078, specifically the Valid Accounts sub-technique, as it leverages legitimate credentials to perform unauthorized actions. It also relates to T1530, Data from Local System, in scenarios where the attacker exfiltrates data stored within the application's backend systems after gaining access through this authorization bypass.
To mitigate this risk, organizations must immediately apply the latest security patches provided by IBM for the affected versions of API Connect. Beyond patching, it is essential to implement robust input validation and strict object-level permission checks on all server-side endpoints that handle resource-specific requests. Developers should ensure that every request verifies both the validity of the user session and their explicit authorization rights relative to the specific target object being accessed. Additionally, adopting a defense-in-depth strategy by integrating Web Application Firewalls with rules designed to detect anomalous patterns in parameter manipulation can provide an additional layer of protection against exploitation attempts while long-term code remediation is underway.