HTTP Request Smuggling Vulnerability in IBM WebSphere Application Server
CVE-2026-11722

4.8MEDIUM

Key Information:

Vendor

IBM
Status
Websphere Application Server
Websphere Application Server - Liberty
Vendor
CVE Published:
18 September 2026

What is CVE-2026-11722?

IBM WebSphere Application Server and WebSphere Application Server Liberty are vulnerable to a sophisticated HTTP request smuggling attack. This type of vulnerability enables malicious actors to manipulate the way web servers interpret HTTP requests, potentially leading to unauthorized access or data manipulation. It is crucial for administrators to update to the latest versions and apply necessary patches to safeguard their applications against such exploits.

Affected Version(s)

WebSphere Application Server 9.0

WebSphere Application Server 8.5

WebSphere Application Server - Liberty 17.0.0.3 <= 26.0.0.5

References

https://www.ibm.com/support/pages/node/7286610
vendor-advisorypatch
https://www.ibm.com/support/pages/node/7286611
vendor-advisorypatch

CVSS V3.1

Score:
4.8
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.