Vulnerability details

CVE-2026-15064

IBM WebSphere Application ServerIBM WebSphere Application Server - Liberty

IBM WebSphere Application Server and WebSphere Application Server Liberty are affected by multiple vulnerabilities

CVSS 3.1

8.7High

Official description

IBM WebSphere Application Server and IBM WebSphere Application Server - Liberty is vulnerable to HTTP Response Smuggling due to improper handling of non-standard HTTP version tokens.

CVSS scores

Score	Version	Source	Vector
8.7High	3.1	CVEProject cvelistV5 (CNA) (ibm)	`CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N`

Affected products

Vendor	Product	Versions	Source
IBM	WebSphere Application Server	8.5	CVEProject cvelistV5 (CNA)
IBM	WebSphere Application Server	9.0	CVEProject cvelistV5 (CNA)
IBM	WebSphere Application Server - Liberty	17.0.0.3 ≤ v ≤ 26.0.0.7	CVEProject cvelistV5 (CNA)

References and advisories

https://www.ibm.com/support/pages/node/7281625 vendor-advisorypatch

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Details

Published: 2026-07-28
Last updated: 2026-09-24
State: Published
Assigner (CNA): ibm

Exploit prediction (EPSS)

0.34%

Probability of exploitation in 30 days

27.7%

Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable: No
Exploitation: None
Technical impact: Total

Weaknesses (CWE)

CWE-444
Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')