CVE-2026-7366: IBM DataPower Gateway race condition in X-Client-IP header handling

CVE-2026-7366 · Severity: medium · CVSS 4.2 · Published 2026-08-12

IBM DataPower Gateway is an enterprise integration appliance that processes HTTP requests in XML-based service chains. A race condition in the gateway's request handling allows concurrent requests to corrupt the X-Client-IP header values, leading to IP spoofing and unintended disclosure of other clients' IP addresses. This could enable attackers to bypass IP-based access controls or expose user information in multi-tenant or high-concurrency environments.

Technologies: IBM DataPower Gateway. Vendors: IBM.

Quick answers

Is CVE-2026-7366 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-7366 being exploited in the wild.
How severe is CVE-2026-7366?
Medium severity, with a CVSS score of 4.2, published 12 August 2026.
Which products and versions are affected?
IBM DataPower Gateway 10.5.0.0 through 10.5.0.21, 10.6.0.0 through 10.6.0.9, 11.0.0.0 through 11.0.0.1.
Is there a fix for CVE-2026-7366?
A patch was published on 2026-08-06: Fixes released in DataPower Gateway 11.0.0.2, 10.6.0.10, and 10.5.0.22 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-7366 attacked?
It is attacked over the network.
Am I affected by CVE-2026-7366?
Check whether you run IBM DataPower Gateway at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

This is a race condition (CWE-362) in the XML Firewall component's handling of the built-in X-Client-IP request header. Under concurrent request processing, insufficient synchronization of request state allows X-Client-IP values to leak across different requests, enabling attackers to spoof IP addresses and disclose other clients' IP addresses. The vulnerability requires network access and authenticated connections (PR:L), though the high complexity (AC:H) suggests a specific concurrency scenario must occur. Patches are available in DataPower Gateway 11.0.0.2, 10.6.0.10, and 10.5.0.22. Workarounds include disabling persistent connections to XML Firewall services or not setting the X-Client-IP header on client requests.

Affected products

  • IBM DataPower Gateway 10.5.0.0 through 10.5.0.21, 10.6.0.0 through 10.6.0.9, 11.0.0.0 through 11.0.0.1

Timeline

  • 2026-08-06: disclosed: IBM Security Bulletin published
  • 2026-08-06: patched: Fixes released in DataPower Gateway 11.0.0.2, 10.6.0.10, and 10.5.0.22

References

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