CVE-2026-9322

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Denial of Service in IBM WebSphere Application Server

Publication date: 2026-07-30

Last updated on: 2026-07-30

Assigner: IBM Corporation

Description

IBM WebSphere Application Server 9.0, and 8.5 and IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.7 are vulnerable to a denial of service via a crafted HTTP request.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-07-30

Last Modified

2026-07-30

Generated

2026-07-31

AI Q&A

2026-07-31

EPSS Evaluated

N/A

NVD

CVE-2026-9322

EUVD

EUVD-2026-51230

Affected Vendors & Products

Vendor	Product	Version / Range
ibm	websphere_application_server	9.0
ibm	websphere_application_server	8.5
ibm	websphere_application_server_liberty	From 17.0.0.3 (inc) to 26.0.0.7 (inc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-400	The product does not properly control the allocation and maintenance of a limited resource.

Attack-Flow Graph

Executive Summary

IBM WebSphere Application Server versions 9.0, 8.5, and Liberty 17.0.0.3 through 26.0.0.7 are vulnerable to a denial of service attack. This occurs when a specially crafted HTTP request is sent to the server, causing it to become unresponsive or crash.

Detection Guidance

This vulnerability can be detected by monitoring for unusual HTTP request patterns or crashes in IBM WebSphere Application Server. Check server logs for HTTP 500 errors or timeouts. Use network monitoring tools to inspect for malformed HTTP requests targeting the server.

Impact Analysis

This vulnerability can lead to service disruption. Attackers could exploit it to make the WebSphere server unavailable, causing downtime for applications relying on it. This may result in loss of access to critical services or data.

Compliance Impact

The vulnerability allows a denial of service via crafted HTTP requests, which could disrupt services handling sensitive data. This may impact compliance with GDPR by affecting availability of personal data processing systems and HIPAA by disrupting healthcare-related services. Downtime could lead to violations of service level agreements or regulatory requirements for data accessibility.

Mitigation Strategies

Apply the latest IBM WebSphere Application Server or Liberty updates to versions beyond 26.0.0.7. Monitor IBM security advisories for patches and restrict network access to vulnerable servers until patched.

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