CVE-2026-15634
IBM WebSphere Application Server and IBM WebSphere Application Server - Liberty Request Smuggling
- State
- Published
- Severity
- 6.5 Medium
- Published
- Sep 14, 2026
- Updated
- Oct 22, 2026
- Reserved
- Jul 13, 2026
Description
IBM WebSphere Application Server 8.5 and 9.0, and IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.8 are vulnerable to HTTP request smuggling, caused by improper parsing of the HTTP transfer-encoding request header. By sending a specially crafted HTTP transfer-encoding request header, an attacker could exploit this vulnerability to poison the web cache, bypass web application firewall protection, and conduct XSS attacks.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 6.5 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N | ibm |
Weaknesses
- CWE-444 Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')
Affected Products
| Product | Versions |
|---|---|
WebSphere Application ServerIBM |
|
WebSphere Application Server - LibertyIBM |
|
References
- https://www.ibm.com/support/pages/node/7286610vendor-advisorypatch
- https://www.ibm.com/support/pages/node/7286611vendor-advisorypatch
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