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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| IBM | WebSphere Application Server | 9.0, 8.5 | — |
| IBM | WebSphere Application Server - Liberty | 17.0.0.3 – ≤ 26.0.0.5 | — |
Advisories 2
- WID-SEC-2026-3255 IBM WebSphere Application Server: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 12, 2026
- WID-SEC-2026-3275 IBM WebSphere Application Server Liberty: Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 12, 2026
References
- https://www.ibm.com/support/pages/node/7286610 vendor-advisory patch
- https://www.ibm.com/support/pages/node/7286611 vendor-advisory patch