HTTP Request Smuggling Vulnerability in IBM WebSphere Application Server
CVE-2026-8646

7.4HIGH

Key Information:

Vendor

IBM
Status
Websphere Application Server
Websphere Application Server - Liberty
Vendor
CVE Published:
22 June 2026

What is CVE-2026-8646?

IBM WebSphere Application Server, including versions 8.5 and 9.0, as well as Liberty 17.0.0.3 to 26.0.0.6, is susceptible to HTTP request smuggling attacks. This vulnerability allows a remote attacker to exploit the application server by sending a specially crafted HTTP request. Successful exploitation can lead to security control bypass, identity spoofing, privilege escalation, and potential exposure of sensitive data, posing significant risks to affected systems.

Affected Version(s)

WebSphere Application Server 9.0.0 <= 7.0.2 Interim Fix 035

WebSphere Application Server 8.5.0 <= 7.0.3 Interim Fix 017

WebSphere Application Server - Liberty 17.0.0.3 <= 26.0.0.6

References

https://www.ibm.com/support/pages/node/7276579
vendor-advisorypatch

CVSS V3.1

Score:
7.4
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.