CVE-2026-9338
Undergoing Analysis Undergoing Analysis - In Progress

Denial of Service in IBM WebSphere Application Server

Publication date: 2026-09-10

Last updated on: 2026-09-10

Assigner: IBM Corporation

Description
IBM WebSphere Application Server 9.0, and 8.5 is vulnerable to a denial of service, caused by sending a specially-crafted request. A remote attacker could exploit this vulnerability to trigger excessive resource consumption, potentially leading to reduced availability of the affected service.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-09-10
Last Modified
2026-09-10
Generated
2026-10-01
AI Q&A
2026-09-10
EPSS Evaluated
2026-09-29
NVD
CVE-2026-9338
EUVD
EUVD-2026-75676

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
ibm websphere_application_server 9.0
ibm websphere_application_server 8.5
ibm websphere_application_server to 9.0.5.29 (exc)
ibm websphere_application_server to 8.5.5.31 (exc)

Helpful Resources

Exploitability

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

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

IBM WebSphere Application Server versions 9.0 and 8.5 are vulnerable to a denial of service attack. This occurs when a specially crafted request is sent to the server, causing excessive resource consumption. The vulnerability allows a remote attacker to reduce the availability of the affected service.

Detection Guidance

To detect this vulnerability, monitor for unusual resource consumption on IBM WebSphere Application Server instances. Check for excessive CPU, memory, or disk usage, particularly after receiving HTTP requests to administrative endpoints. Use system monitoring tools like top, htop, or netstat to identify abnormal processes or network traffic patterns.

Impact Analysis

This vulnerability could lead to service disruptions, making the WebSphere Application Server unavailable. If exploited, it may cause performance degradation or complete downtime for applications relying on the server.

Compliance Impact

This vulnerability causes denial of service through resource exhaustion, which could disrupt service availability. While not directly violating GDPR or HIPAA, such disruptions may impact data processing operations subject to these regulations, potentially leading to compliance issues if critical services are unavailable.

Mitigation Strategies

Apply the latest IBM WebSphere Application Server patches or updates to address the denial of service vulnerability. Monitor network traffic for unusual requests and restrict access to the server if possible.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-9338. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart