CVE-2026-9072 in IBM
Summary
by MITRE • 06/22/2026
IBM i 7.6, 7.5, 7.4, and 7.3, IBM WebSphere Application Server, and IBM WebSphere Application Server Liberty - when using Intelligent Management with the WebSphere WebServer Plug-in component - are vulnerable to remote code execution and denial of service. This vulnerability can be exploited when an attacker impersonates backend servers and sends crafted responses to the plug-in.
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Analysis
by VulDB Data Team • 06/23/2026
This vulnerability affects IBM i operating systems version 7.6, 7.5, 7.4, and 7.3 along with IBM WebSphere Application Server and Liberty profiles when utilizing Intelligent Management with the WebServer Plug-in component. The flaw represents a critical security weakness that enables remote code execution and denial of service attacks through manipulation of backend server communications. The vulnerability stems from insufficient validation mechanisms within the WebSphere WebServer Plug-in that fail to properly authenticate and verify responses from backend servers, creating an attack surface where malicious actors can impersonate legitimate backend systems.
The technical implementation of this vulnerability resides in the plug-in's handling of responses from backend servers within the Intelligent Management framework. When the plug-in receives communications from what it believes to be legitimate backend systems, it processes these responses without adequate verification of their authenticity or integrity. This allows attackers who have gained network access or can perform man-in-the-middle attacks to craft malicious responses that appear genuine to the plug-in component. The vulnerability aligns with CWE-284 Access Control Issues and CWE-345 Insufficient Verification of Data Authenticity, where improper validation leads to unauthorized operations.
The operational impact of this vulnerability is severe as it provides attackers with potential remote code execution capabilities on affected systems. An attacker who successfully exploits this vulnerability could execute arbitrary code within the context of the WebSphere Application Server process, potentially leading to complete system compromise. Additionally, the denial of service component allows adversaries to disrupt services by sending malformed responses that cause the plug-in to crash or become unresponsive. This affects availability and can result in significant business disruption for organizations relying on these application servers.
Organizations should implement immediate mitigations including network segmentation to restrict access to backend server communications, deployment of intrusion detection systems to monitor for suspicious response patterns, and configuration hardening of the WebSphere WebServer Plug-in components. The IBM Security Bulletin provides specific patches and workaround procedures that address this vulnerability by strengthening authentication mechanisms and improving response validation. Additionally, implementing network-level controls such as firewall rules to limit backend communication and deploying web application firewalls can provide additional protection layers. This vulnerability maps to attack techniques in the MITRE ATT&CK framework under T1059 Command and Scripting Interpreter and T1499 Endpoint Denial of Service, highlighting the multi-faceted nature of the threat landscape this issue presents.