Vulnerability in IBM Websphere Application Server
CVE-2026-15064
IBM WebSphere Application Server 9.0, and 8.5 and IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.7 is vulnerable to HTTP Response Smuggling due to improper handling of non-standard HTTP version tokens.
Vulnerability class: HTTP Request Smuggling
EPSS: 0.002 (12.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.7 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N.
Affected products
- Ibm Websphere Application Server — versions 9.0, 8.5
- Ibm Websphere_application_server
- Ibm Websphere Application Server - Liberty — versions 17.0.0.3
Weakness classification (CWE)
References
- psirt@us.ibm.com (vendor-advisory, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-15064?
- CVE-2026-15064 is a high-severity vulnerability in IBM Websphere Application Server, classified under Inconsistent Interpretation of HTTP Requests (HTTP Request/Response Smuggling). CVSS score: 8.7/10. Published 2026-07-28.
- How severe is CVE-2026-15064?
- High severity. CVSS v3 base score is 8.7 out of 10.