Description

IBM WebSphere Application Server 9.0, and 8.5 is affected by an authentication bypass vulnerability when using XD or Intelligent-Management features.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "5.9",
  "pubDate": "2026-09-14T20:16:40.790Z",
  "pubdate": "2026-09-14T20:16:40.790Z",
  "executiveSummary": "IBM WebSphere Application Server versions 9.0 and 8.5 are susceptible to an authentication bypass vulnerability.\nThe vulnerability resides within the XD and Intelligent-Management feature set, potentially allowing unauthorized actors to circumvent security controls.\nSuccessful exploitation permits an unauthenticated attacker to bypass established authentication mechanisms, leading to unauthorized access to protected resources and services.\nThis vulnerability presents a high risk, as it allows attackers to interact with the application server as if they were authenticated users, potentially leading to unauthorized data access, administrative action execution, or disruption of service.\nThe threat is primarily constrained to deployments where the Intelligent-Management or XD features are active, as these components introduce the vulnerable code paths.\nExploitation does not require prior user credentials, lowering the barrier for entry for remote attackers to compromise the integrity and confidentiality of the application environment.\nOrganizations must assess their WebSphere configurations to determine the necessity of these features and apply recommended security updates or mitigations provided by IBM to secure the environment against unauthorized access.",
  "technicalDetails": "The vulnerability is rooted in a flaw within the authentication handling logic utilized by the WebSphere XD (eXtreme Scale/Extended Deployment) and Intelligent-Management features.\nThese features are designed to enhance workload management, application routing, and high availability. However, the implementation of security filters or interceptors intended to validate user identity fails to enforce authentication correctly under specific configurations.\nThe root cause involves improper validation of requests processed through the Intelligent-Management framework. When these features are enabled, the server performs a series of lookups and routing decisions that, under certain conditions, bypass the standard security interceptor chain.\nAn attacker can exploit this by crafting specific HTTP requests that trigger the vulnerable routing logic. By manipulating request parameters or headers that the XD or Intelligent-Management components rely upon for internal traffic management, an attacker can trick the server into treating an unauthenticated request as a trusted or already-authenticated session.\nThe attack flow typically involves the following steps: 1) Identification of an IBM WebSphere instance with Intelligent-Management or XD features enabled. 2) Crafting of an HTTP request designed to leverage the routing metadata processed by these features. 3) Injection of the request into the application server, causing the vulnerable component to misidentify the security context of the incoming request. 4) The server proceeds to grant access to protected resources, bypassing the expected authentication handshake.\nThe vulnerable component is the Intelligent-Management/XD request processing pipeline. Because this pipeline executes prior to or independently of standard application-level authentication, it effectively invalidates the security posture of the entire application suite running on the affected server.\nThis vulnerability is classified as an authentication bypass because it allows an attacker to operate within the environment without possessing valid credentials, thereby escalating their privilege level from unauthenticated to authenticated.\nThe impact of a successful exploitation is severe, as it facilitates unauthorized access to administrative consoles, application logic, and potentially sensitive backend data. Post-exploitation, an attacker could theoretically modify system configurations, execute arbitrary commands if management interfaces are exposed, or extract business-critical data without triggering standard authentication logs."
}