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

Source: https://junglewise.ai/threats/cve-2026-7366-ibm-datapower-gateway-race-condition-in-x-client-ip-header  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-12. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

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](https://junglewise.ai/threats/technologies/datapower-gateway). Vendors: [IBM](https://junglewise.ai/threats/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

- [https://www.ibm.com/support/pages/node/7282770](https://www.ibm.com/support/pages/node/7282770)

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