Description

IBM API Connect 12.1.0.0 through 12.1.1.2 could allow a remote attacker to obtain sensitive information and take control of gateway configuration due to authentication bypass via an alternate path.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "9.8",
  "pubDate": "2026-11-07T05:18:40.163Z",
  "pubdate": "2026-11-07T05:18:40.163Z",
  "executiveSummary": "IBM API Connect versions 12.1.0.0 through 12.1.1.2 are susceptible to a critical authentication bypass vulnerability stemming from an alternate path issue.\nThis vulnerability allows a remote, unauthenticated attacker to circumvent standard security controls, facilitating unauthorized access to the gateway.\nThe primary risk involves the potential for sensitive information disclosure and the unauthorized modification of critical gateway configurations.\nBy leveraging this alternate path, an attacker can effectively bypass the identity verification mechanisms normally required to manage the API management infrastructure.\nThe vulnerability is remotely exploitable, requiring no prior authentication or administrative access to the target system.\nThe compromise of gateway configuration poses a significant security threat, potentially enabling an attacker to intercept, manipulate, or redirect API traffic, thereby undermining the confidentiality and integrity of the entire API ecosystem.",
  "technicalDetails": "The vulnerability identified in IBM API Connect (12.1.0.0 through 12.1.1.2) originates from a flaw in the authentication logic, specifically categorized as an authentication bypass via an alternate path.\nThis occurs when the application architecture provides multiple request paths to reach a protected resource, but fails to enforce consistent authentication and authorization checks across all available routes.\nIn the context of the IBM API Connect gateway, an attacker can manipulate request vectors—such as specific URI structures or header configurations—to access administrative or sensitive endpoints that are intended to be guarded by the primary authentication module.\nThe root cause resides in the request routing layer or the input validation framework, which fails to map security constraints correctly to every possible path that resolves to the vulnerable component.\nAttack flow typically involves the attacker crafting a malicious request directed at an obscured or alternate internal route. Because the underlying security middleware assumes that only authenticated requests originate from the primary, secured entry point, the alternate path lacks the mandatory identity validation check.\nOnce the attacker successfully navigates this bypass, the application processes the request with the privileges of an authenticated user or, in some cases, an administrative service account.\nExploitation allows the attacker to interact with the gateway’s management API directly. This grants the attacker the ability to retrieve configuration metadata, API keys, secrets, or internal service definitions (Sensitive Information Disclosure).\nFurthermore, the ability to manipulate gateway configuration implies that an attacker could inject malicious policies, alter endpoint routing logic, or disable security enforcement modules, effectively gaining full control over the gateway’s operational state.\nThe vulnerability requires no elevated privileges to initiate; it is a network-accessible flaw that can be triggered over common protocols (typically HTTP/HTTPS) used by the API Connect management interfaces.\nPost-exploitation impact is severe, as the attacker effectively becomes an 'authorized' operator within the gateway environment, allowing for long-term persistence and total compromise of the traffic flowing through the impacted API Connect deployment."
}