CVE-2026-7366 in DataPower Gateway
Summary
by MITRE • 08/12/2026
IBM DataPower Gateway 11.0.0.0 through 11.0.0.1 and IBM DataPower Gateway 10.5.0.0 through 10.5.0.21 and IBM DataPower Gateway 10.6.0.0 through 10.6.0.9 allows a race condition that results in improper isolation of request state when handling the built‑in X‑Client‑IP header. Under concurrent request processing, X‑Client‑IP values may be contaminated across requests, enabling IP spoofing and disclosure of other clients’ IP addresses.
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Analysis
by VulDB Data Team • 08/12/2026
This vulnerability exists in IBM DataPower Gateway versions 11.0.0.0 through 11.0.0.1, 10.5.0.0 through 10.5.0.21, and 10.6.0.0 through 10.6.0.9, representing a critical race condition flaw that fundamentally compromises the security isolation mechanisms of the gateway system. The vulnerability specifically affects how the system handles the built-in X-Client-IP header during concurrent request processing, creating a scenario where multiple requests can interfere with each other's state management. This improper isolation occurs when the gateway processes multiple requests simultaneously, causing the X-Client-IP values to become contaminated across different client sessions.
The technical flaw manifests as a race condition in the internal state management of the DataPower Gateway, where concurrent request handling does not properly serialize access to shared resources containing client IP address information. This condition falls under CWE-362, which specifically addresses Race Conditions, and represents a classic example of improper resource sharing between concurrent threads or processes. The vulnerability enables attackers to exploit the lack of proper synchronization mechanisms that should ensure each request maintains its own isolated state information.
The operational impact of this vulnerability is significant as it allows for IP spoofing attacks where malicious actors can potentially access or manipulate data intended for other clients. When X-Client-IP values become contaminated across requests, legitimate users may inadvertently receive incorrect client identification information, leading to unauthorized access to sensitive data or services. This contamination creates a situation where the gateway cannot properly distinguish between different clients, effectively breaking the fundamental security principle of request isolation that is essential for maintaining proper access controls and audit trails.
The implications extend beyond simple information disclosure to potentially enable more sophisticated attacks including session hijacking, cross-site request forgery, and privilege escalation. Attackers could exploit this vulnerability to impersonate other users, access restricted resources, or conduct surveillance on other clients' network activities by observing the contaminated IP addresses that leak between concurrent requests. This vulnerability directly impacts the integrity of client identification mechanisms within the DataPower Gateway, undermining trust in the system's ability to properly authenticate and authorize network traffic.
Organizations should implement immediate mitigations including applying the latest security patches from IBM, which address the race condition through proper synchronization mechanisms for shared state management. Network segmentation and additional monitoring controls should be deployed to detect anomalous behavior patterns that might indicate exploitation attempts. The vulnerability also highlights the importance of following security best practices outlined in the ATT&CK framework under T1566 for credential access and T1071 for application layer protocol usage, as this flaw enables attackers to manipulate client identification information during legitimate network communications. System administrators should also consider implementing additional logging controls that track X-Client-IP header processing to detect potential contamination events before they result in security breaches.