CVE-2026-15396
IBM WebSphere Application Server 9.0, and 8.5 and IBM WebSphere Application Server - Liberty 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.
- Published Sep 14, 2026
- CVSS 6.5 medium
- 0.3% chance of exploitation in the next 30 days (EPSS)
Affected software
In the news
- Multiple vulnerabilities in IBM products CERT-FR ·