IBM DataPower GW 10.5-11.0: Race Condition on XClientIP Enables IP Spoofing
CVE-2026-7366 Published on August 12, 2026
IBM DataPower Gateway affected by HTTP request header leakage in XML-Firewall
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 builtin XClientIP header. Under concurrent request processing, XClientIP values may be contaminated across requests, enabling IP spoofing and disclosure of other clients IP addresses.
Vulnerability Analysis
CVE-2026-7366 is exploitable with network access, and requires small amount of user privileges. This vulnerability is consided to have a high level of attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality and integrity, and no impact on availability.
Weakness Type
What is a Race Condition Vulnerability?
The program contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently.
CVE-2026-7366 has been classified to as a Race Condition vulnerability or weakness.
Products Associated with CVE-2026-7366
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Affected Versions
IBM DataPower Gateway 11.0.0:- Version 11.0.0.0, <= 11.0.0.1 is affected.
- Version 10.5.0.0, <= 10.5.0.21 is affected.
- Version 10.6.0.0, <= 10.6.0.9 is affected.