---
id: CVE-2026-15064
title: >-
  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.
summary: >-
  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.
severity: high
cvss: 8.7
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N'
cwe:
  - CWE-444
vendor: ibm
product: websphere_application_server
affected:
  - 'websphere_application_server >= 8.5.0.0, < 8.5.5.31'
  - 'websphere_application_server >= 9.0.0.0, < 9.0.5.29'
  - 'websphere_application_server >= 17.0.0.3, < 26.0.0.8'
patched:
  - websphere_application_server 26.0.0.8
published: '2026-07-28'
updated: '2026-09-23'
sourceUpdated: '2026-09-23T21:16:58.210'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-15064'
references:
  - url: 'https://www.ibm.com/support/pages/node/7281625'
    label: psirt@us.ibm.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-07-29T00:00:00+00:00'
epss: 0.0022
epssPercentile: 0.12761
ingestedAt: '2026-09-23T21:33:13.507Z'
---

## Overview

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.

## Affected

- `websphere_application_server >= 8.5.0.0, < 8.5.5.31`
- `websphere_application_server >= 9.0.0.0, < 9.0.5.29`
- `websphere_application_server >= 17.0.0.3, < 26.0.0.8`

## Remediation

Upgrade past the affected range:

- `websphere_application_server 26.0.0.8`