Description

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.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "8.5",
  "pubDate": "2026-11-07T05:18:51.953Z",
  "pubdate": "2026-11-07T05:18:51.953Z",
  "executiveSummary": "IBM API Connect versions 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2 are susceptible to an improper authorization vulnerability. This flaw allows a remote, authenticated attacker to gain unauthorized access to sensitive information by manipulating user-controlled keys within the API request lifecycle. The vulnerability stems from a failure in the application's authorization logic, which fails to correctly validate permissions against provided input keys. Exploitation requires the attacker to hold an authenticated session, though they do not necessarily require high-level administrative privileges to perform the unauthorized data retrieval. The impact of this vulnerability is significant, as it permits the unauthorized disclosure of data that should otherwise be protected by access control policies. Given the role of API Connect as a centralized gateway for API management, this vulnerability poses a risk to the confidentiality of backend services and sensitive business data. Immediate attention is required to ensure that access control mechanisms are correctly implemented and that all input keys are validated against a hardened authorization policy.",
  "technicalDetails": "The vulnerability resides within the authorization validation logic of IBM API Connect, specifically impacting how the platform processes user-supplied keys during the verification of request headers or payload parameters. The root cause is identified as an improper authorization validation mechanism, where the system fails to sufficiently sanitize or verify the integrity and origin of user-controlled keys before granting access to requested resources. Because the application logic relies on these user-supplied values to determine access permissions, an attacker can manipulate these keys to bypass existing security controls.\nThe exploitation flow begins with the attacker establishing a legitimate, authenticated connection to the IBM API Connect environment. Once authenticated, the attacker crafts a malicious request by injecting specific, user-controlled keys—such as identifiers or tokens—that are intended to trick the authorization engine. Because the validation process fails to correctly bind these keys to the requester's actual identity or scope, the authorization engine erroneously grants access to data objects or resources belonging to other users or sensitive system areas.\nThis vulnerability is classified as an authorization bypass resulting from insufficient input validation. The vulnerable component is the underlying authorization framework that manages API request flow. Because the authentication requirement is already met, the attacker occupies a position where they can interact with the API gateway directly. The lack of proper server-side verification means that the manipulated keys effectively authorize the attacker to perform actions or read data that should have been restricted.\nThe impact of successful exploitation includes the unauthorized retrieval of sensitive information. By systematically iterating or manipulating these user-controlled keys, an attacker can perform mass data exfiltration of API responses. This poses a severe risk in multi-tenant environments or systems managing PII, as the attacker can pivot from their legitimate access level to obtain unauthorized data across the platform. The post-exploitation phase is characterized by the silent extraction of restricted information, potentially evading traditional signature-based detection mechanisms as the requests appear to be legitimate, authenticated API calls.\nAffected software versions include IBM API Connect 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2. The exposure is limited to authenticated users; however, in many enterprise deployments, authenticated access may be widely available to various application users or partners, increasing the overall attack surface."
}