CVE-2026-9320

Analyzed Analyzed - Analysis Complete

Denial of Service in IBM WebSphere Application Server

Publication date: 2026-06-22

Last updated on: 2026-06-23

Assigner: IBM Corporation

Description

IBM WebSphere Application Server 9.0, and 8.5 and IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.6 are vulnerable to a denial of service, caused by sending a specially-crafted request. A remote attacker could exploit this vulnerability to cause the server to consume memory resources.

CVSS Scores

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Meta Information

Published

2026-06-22

Last Modified

2026-06-23

Generated

2026-07-13

AI Q&A

2026-06-22

EPSS Evaluated

2026-07-11

NVD

CVE-2026-9320

EUVD

EUVD-2026-38254

Affected Vendors & Products

Vendor	Product	Version / Range
ibm	websphere_application_server	From 8.5.0.0 (inc) to 8.5.5.30 (exc)
ibm	websphere_application_server	From 9.0.0.0 (inc) to 9.0.5.29 (exc)
ibm	websphere_application_server	From 17.0.0.3 (inc) to 26.0.0.7 (exc)

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

Compliance Impact

The provided information does not specify how the denial of service vulnerability in IBM WebSphere Application Server (CVE-2026-9320) impacts compliance with common standards and regulations such as GDPR or HIPAA.

Executive Summary

This vulnerability affects IBM WebSphere Application Server versions 9.0, 8.5, and IBM WebSphere Application Server - Liberty versions 17.0.0.3 through 26.0.0.6. It is caused by sending a specially-crafted request to the server.

A remote attacker can exploit this vulnerability to cause the server to consume excessive memory resources, leading to a denial of service condition.

Impact Analysis

Exploitation of this vulnerability can cause the affected IBM WebSphere Application Server to consume excessive memory resources.

This can result in a denial of service (DoS), where legitimate users may be unable to access the server or its services due to resource exhaustion.

Mitigation Strategies

The CVE description indicates that the vulnerability is caused by sending a specially-crafted request that leads to denial of service by consuming memory resources on IBM WebSphere Application Server versions 8.5, 9.0, and Liberty 17.0.0.3 through 26.0.0.6.

No specific mitigation steps or workarounds are provided in the given resources for CVE-2026-9320.

Based on typical best practices for such vulnerabilities, immediate steps would generally include monitoring and restricting incoming requests to prevent malformed or suspicious traffic, applying any available patches or updates from IBM once released, and considering temporary network-level protections such as rate limiting or firewall rules to reduce exposure.

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