CVE-2026-15064: IBM WebSphere Application Server and WebSphere Application Server Liberty are affected by multiple vulnerabilities

Published Jul 28, 2026
·
Updated

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.

Other sources

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.

— IBM

Affected Software

9 affected components
IBM WebSphere Application Server 9.0
IBM WebSphere Application Server 8.5
IBM WebSphere Application Server Liberty>=17.0.0.3<=26.0.0.7
IBM WebSphere Application Server<=9.0
IBM WebSphere Application Server<=8.5
IBM WebSphere Application Server - Liberty<=17.0.0.3 - 26.0.0.7
IBM WebSphere Application Server>=8.5.0.0<8.5.5.31
IBM WebSphere Application Server>=9.0.0.0<9.0.5.29
IBM WebSphere Application Server>=17.0.0.3<26.0.0.8

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade IBM WebSphere Application Server Liberty to a version that resolves this vulnerability.

    Fixed in 17.0.0.3
  2. Upgrade

    Upgrade IBM WebSphere Application Server Liberty to a version that resolves this vulnerability.

    Fixed in 26.0.0.7Patch PH72191
  3. Upgrade

    Upgrade IBM WebSphere Application Server traditional to a version that resolves this vulnerability.

    Fixed in 9.0.0.0Patch PH72192
  4. Upgrade

    Upgrade IBM WebSphere Application Server traditional to a version that resolves this vulnerability.

    Fixed in 9.0.5.28Patch PH72192
  5. Upgrade

    Upgrade IBM WebSphere Application Server traditional to a version that resolves this vulnerability.

    Fixed in 8.5.0.0Patch PH72192
  6. Upgrade

    Upgrade IBM WebSphere Application Server traditional to a version that resolves this vulnerability.

    Fixed in 8.5.5.30Patch PH72192

Event History

Jul 28, 2026
CVE Published
via IBM·12:00 AM
Data Sourced
via IBM·12:00 AM
DescriptionAffected Software
CVE Published
via MITRE·08:10 PM
Data Sourced
via MITRE·08:10 PM
RemedyDescriptionSeverityWeakness
Data Sourced
via NVD·09:17 PM
DescriptionSeverityWeaknessAffected Software

Parent advisories

This vulnerability appears in the following advisories.

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Frequently Asked Questions

1

What is the severity of CVE-2026-15064?

CVE-2026-15064 has a severity score of 8.7, classified as high risk.

2

How do I fix CVE-2026-15064?

To fix CVE-2026-15064, apply the latest patches and updates provided by IBM for WebSphere Application Server and Liberty.

3

What are the affected versions of CVE-2026-15064?

CVE-2026-15064 affects IBM WebSphere Application Server versions 9.0 and 8.5, as well as WebSphere Application Server - Liberty versions 17.0.0.3 through 26.0.0.7.

4

What type of vulnerability is CVE-2026-15064?

CVE-2026-15064 is classified as an HTTP Response Smuggling vulnerability due to improper handling of non-standard HTTP version tokens.

5

What components are impacted by CVE-2026-15064?

CVE-2026-15064 impacts multiple components of IBM WebSphere Application Server and WebSphere Application Server Liberty.

Company

Resources

Contact

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