CVE-2026-15328: IBM WebSphere Application Server and WebSphere Application Server Liberty is inconsistent Interpretation of HTTP Requests

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 request smuggling.

Other sources

IBM WebSphere Application Server and IBM WebSphere Application Server - Liberty is vulnerable to HTTP request smuggling.

— 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 26.0.0.8
  2. Upgrade

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

    Fixed in 8.5.5.31
  3. Upgrade

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

    Fixed in 9.0.5.29
  4. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Patch PH72192
  5. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Patch PH72191

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·08:04 PM
Data Sourced
via MITRE·08:04 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-2026-15328?

CVE-2026-15328 has a high severity rating of 7.4.

2

What systems are affected by CVE-2026-15328?

CVE-2026-15328 affects IBM WebSphere Application Server versions 9.0, 8.5, and IBM WebSphere Application Server - Liberty versions 17.0.0.3 through 26.0.0.7.

3

How do I fix CVE-2026-15328?

To remediate CVE-2026-15328, upgrade to the latest version of IBM WebSphere Application Server or WebSphere Application Server - Liberty that addresses this vulnerability.

4

What is HTTP request smuggling in the context of CVE-2026-15328?

HTTP request smuggling in CVE-2026-15328 refers to the inconsistent interpretation of HTTP requests by the affected WebSphere Application Servers, which can lead to various security issues.

5

What potential impact does CVE-2026-15328 have on my applications?

CVE-2026-15328 can lead to unauthorized data exposure and manipulation, potentially compromising the security and integrity of applications deployed on the affected servers.

Company

Resources

Contact

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