Description

IBM API Connect 12.1.0.0 through 12.1.1.2 could allow a remote authenticated attacker to bypass security restrictions due to a confused deputy vulnerability.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "9.9",
  "pubDate": "2026-11-07T05:18:22.990Z",
  "pubdate": "2026-11-07T05:18:22.990Z",
  "executiveSummary": "IBM API Connect versions 12.1.0.0 through 12.1.1.2 are susceptible to a security restriction bypass vulnerability originating from a confused deputy flaw.\nThis vulnerability allows a remote, authenticated attacker to manipulate the system into performing unauthorized operations by leveraging the trust relationship between internal components.\nThe flaw stems from a failure in the application to properly validate the context or origin of requests when invoking privileged internal functions.\nSuccessful exploitation grants the attacker the ability to bypass intended security controls, potentially resulting in unauthorized access to sensitive API configurations, data leakage, or the execution of administrative commands.\nThis vulnerability is particularly dangerous as it exploits the architectural trust of the platform, turning legitimate system processes into agents for malicious actions.\nThe risk is categorized as high, as it requires authenticated access to the management plane, which is often accessible to internal users or compromised accounts with sufficient permissions to initiate API calls.\nOrganizations using the specified versions of IBM API Connect are advised to review access logs and apply available security updates to mitigate the risk of privilege escalation and control plane compromise.",
  "technicalDetails": "The identified vulnerability is classified as a confused deputy problem, a specific type of logic flaw where a more privileged system component performs an action on behalf of a less privileged actor without sufficiently validating the authorization context.\nIn the context of IBM API Connect versions 12.1.0.0 through 12.1.1.2, the management and gateway components fail to verify that the originator of a request has the necessary administrative permissions to trigger sensitive backend functions.\nThe root cause is located in the internal request handling logic, where the system incorrectly trusts incoming requests that originate from specific authenticated contexts, assuming the request is internally initiated by the application's own infrastructure.\nAn authenticated attacker, already possessing valid session credentials for the API Connect management interface, can craft requests that exploit this trust boundary. By manipulating request headers, parameters, or utilizing specific API endpoints, the attacker forces the 'deputy' (the vulnerable system process) to execute actions against resources that should be restricted to users with higher privilege levels.\nThe attack flow follows a structured pattern: first, the attacker authenticates as a standard user within the environment. Second, the attacker targets an internal service or administrative endpoint that fails to validate the authorization context of the calling entity. Third, the attacker provides malformed or crafted input that triggers the deputy process to interpret the request as a legitimate, system-level command.\nBecause the deputy process operates with high-level service credentials or system-wide permissions, the final action is executed with the deputy's authority rather than the attacker's restricted authority.\nThis bypasses the existing Role-Based Access Control (RBAC) mechanisms that are designed to guard these sensitive API Connect operations. The impact of this behavior is broad; it allows for the modification of API gateway configurations, the exposure of internal metadata, and potentially the unauthorized modification of backend integration endpoints. Post-exploitation, an attacker may achieve persistent unauthorized access, effectively escalating their privileges to that of an administrative user. The vulnerability is fundamentally a failure to isolate user-supplied input from system-privileged execution pathways within the internal API stack."
}