Description

IBM API Connect 12.1.0.0 through 12.1.1.2 could allow a remote authenticated attacker to bypass authorization checks to access or modify sensitive information due to improper authorization.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "8.1",
  "pubDate": "2026-11-07T05:18:46.130Z",
  "pubdate": "2026-11-07T05:18:46.130Z",
  "executiveSummary": "This vulnerability involves an improper authorization flaw within IBM API Connect, affecting versions 12.1.0.0 through 12.1.1.2.\nThe issue manifests as an authorization bypass, allowing a remote authenticated attacker to circumvent established access control policies.\nSuccessful exploitation enables unauthorized users to access or modify sensitive information that should otherwise be protected by internal security constraints.\nThe vulnerability resides within the authorization logic of the API Connect platform, posing a significant risk to data confidentiality and integrity.\nThe attack vector requires the adversary to be an authenticated user within the system, meaning they must possess valid credentials to initiate the exploitation sequence.\nOnce authenticated, the attacker can leverage the flaw to perform actions or access resources outside of their assigned authorization scope, effectively escalating their capabilities beyond their intended privilege level.\nGiven the nature of API Connect as a gateway for enterprise services, this vulnerability could facilitate unauthorized data exfiltration or unauthorized manipulation of API definitions and configurations.\nOrganizations using the specified versions are advised to prioritize security updates to mitigate the risk of unauthorized resource access.",
  "technicalDetails": "The vulnerability is rooted in an improper authorization implementation within the API Connect core processing logic. In the affected versions (12.1.0.0 through 12.1.1.2), the application fails to properly validate the authorization context for specific requests after the initial authentication phase has been completed.\nWhen a user interacts with the API Connect interface or associated administrative endpoints, the system is expected to verify the user's permissions against the target resource or action. The flaw exists because the authorization checks are either bypassed or insufficiently restrictive, allowing an authenticated user to perform operations that should be governed by more granular access control lists (ACLs) or role-based access control (RBAC) mechanisms.\nThe attack flow initiates with the adversary authenticating to the platform using legitimate credentials. Once the session is established, the attacker identifies target endpoints or API calls that perform sensitive operations, such as configuration modification, data retrieval, or administrative tasks.\nBy crafting specific HTTP requests that target these sensitive endpoints, the attacker exploits the flawed authorization logic. Because the system does not enforce strict checks on these requests post-authentication, the platform processes the request as if the user possesses the requisite privileges. This results in the server executing the command or returning protected data that would normally trigger a '403 Forbidden' response.\nThe vulnerable component appears to be the internal request handler responsible for validating authorization tokens or session attributes against resource access policies. The failure to re-validate the scope of the user's permissions during sensitive request processing allows for the bypass.\nThe impact is significant, as it effectively nullifies the protection provided by the authorization layer for authenticated users. An attacker with standard user privileges could potentially access administrative functions or sensitive data meant for higher-privileged accounts or restricted system roles. Post-exploitation, the attacker might gain read/write access to sensitive information managed through the API Connect instance, potentially leading to a broader compromise of the integrated services or the backend systems managed by the API gateway.\nThere is no evidence to suggest that the vulnerability is exploitable by an unauthenticated entity; however, it remains a severe issue for multi-tenant or multi-user environments where trust boundaries rely on proper authorization enforcement."
}