# CVE-2026-11722: IBM WebSphere Application Server HTTP request smuggling

Source: https://junglewise.ai/threats/cve-2026-11722-ibm-websphere-application-server-and-websphere-application-server  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-18. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-11722 · Severity: medium · CVSS 4.8 · Published 2026-09-18

IBM WebSphere Application Server (both traditional and Liberty editions) contains an HTTP request smuggling vulnerability that could allow attackers to bypass security controls or manipulate requests. The vulnerability affects web application servers that process HTTP traffic, and successful exploitation could lead to request interception, cache poisoning, or unauthorized access to backend systems.

Technologies: [IBM WebSphere Application Server](https://junglewise.ai/threats/technologies/websphere-application-server), [IBM WebSphere Application Server Liberty](https://junglewise.ai/threats/technologies/websphere-application-server-liberty). Vendors: [IBM](https://junglewise.ai/threats/vendors/ibm).

## Quick answers

**Is CVE-2026-11722 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-11722 being exploited in the wild.

**How severe is CVE-2026-11722?** Medium severity, with a CVSS score of 4.8, published 18 September 2026.

**Which products and versions are affected?** IBM WebSphere Application Server multiple versions; IBM WebSphere Application Server Liberty 17.0.0.3 through 26.0.0.8.

**Is there a fix for CVE-2026-11722?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-11722 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-11722?** Check whether you run IBM WebSphere Application Server or IBM WebSphere Application Server Liberty 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

HTTP request smuggling arises from inconsistent interpretation of HTTP request boundaries between the front-end proxy and backend server. An attacker can craft malformed requests to trick the server into processing unintended commands, typically requiring network access but no authentication. Exploitation may expose backend functionality or enable session hijacking.

## Affected products

- IBM WebSphere Application Server multiple versions
- IBM WebSphere Application Server Liberty 17.0.0.3 through 26.0.0.8

## Timeline

- 2026-09-18: disclosed

## References

- [https://www.ibm.com/support/pages/node/7287740](https://www.ibm.com/support/pages/node/7287740)

## Related threats

- [IBM WebSphere Application Server Liberty information disclosure in JMX REST connector](https://junglewise.ai/threats/cve-2026-78636-ibm-websphere-application-server-liberty-17-0-0-3-through-26-0-0)
- [IBM WebSphere Application Server Liberty server-side request forgery in Admin Center](https://junglewise.ai/threats/cve-2026-11547-ibm-websphere-application-server-liberty-17-0-0-3-through-26-0-0)
- [IBM WebSphere Application Server Liberty open redirect](https://junglewise.ai/threats/cve-2026-10844-ibm-websphere-application-server-liberty-17-0-0-3-through-26-0-0)
- [IBM WebSphere Application Server Liberty information disclosure](https://junglewise.ai/threats/cve-2026-108284-ibm-websphere-application-server-liberty-17-0-0-3-through-26-0-0)
- [IBM WebSphere Application Server Liberty information disclosure](https://junglewise.ai/threats/cve-2026-103320-ibm-websphere-application-server-liberty-17-0-0-3-through-26-0-0)