CVE-2026-9338

IBM WebSphere Application Server prior to 9.0.5.29 and 8.5.5.31 are affected by multiple vulnerabilities

Published Sep 10, 2026 CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed

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.

Analysis

Technical impact

The vulnerability allows a causes the IBM WebSphere Application Server to consume excessive resources, leading to a denial of service. This flaw is classified as CWE-400 (Uncontrolled Resource Consumption). The primary impact is reduced availability for the affected service.

Affected Systems

IBM WebSphere Application Server prior to versions 8.5.5.31 and 9.0.5.29 are vulnerable until the relevant fix pack is applied.

Risk and Exploitability

The CVSS score of 5.3 indicates moderate severity, and the lack of EPSS data coupled with the vulnerability not being listed in the KEV catalog suggests a lower current exploitation probability. Nevertheless, as the issue is a remote denial of service, an attacker could trigger widespread resource exhaustion if the server is exposed to external traffic. The fix is recommended to mitigate the risk.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

IBM

WebSphere Application Server

affected

Version	Status	Constraints
`9.0`	affected	—
`8.5`	affected	—

Configuration 1 [-]

OR	cpe:2.3:a:ibm:websphere_application_server:::::-:::*
	cpe:2.3:a:ibm:websphere_application_server:::::-:::*

No data.

Vendor Product Versions

Ibm

Websphere Application Server

Version	Status	Scheme	Platform
`[9.0,9.0]`	affected	generic	—
`[8.5,8.5]`	affected	generic	—

Remediation

Vendor Solution

IBM strongly recommends addressing the vulnerabilities now by applying the fix pack(s) listed below. For IBM WebSphere Application Server traditional: For V9.0.0.0 through 9.0.5.28: · Apply Fix Pack 9.0.5.29 SB0030823 (availability September 2026) or later fix pack. For V8.5.0.0 through 8.5.5.30: · Apply Fix Pack 8.5.5.31 https://www.ibm.com/support/pages/node/7285869 (availability September 2026) or later fix pack.

OpenCVE Recommended Actions

Apply IBM WebSphere Application Server Fix Pack 9.0.5.29 SB0030823 or later for version 9, and 8.5.5.31 or later for version 8.5.
Restart each affected WebSphere application server to apply the patch changes.
Configure adequate resource limits to prevent uncontrolled resource consumption and monitor utilization after the restart.

Generated by OpenCVE AI on September 10, 2026 at 23:17 UTC.

Tracking

Advisories

No advisories available

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact Low

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.490% probability within 30 days)

Exploitation none

Automatable yes

Technical Impact partial

References

Link	Providers
https://www.ibm.com/support/pages/node/7286610

History

Sep 16, 2026 6:30 PM Affected versions updated View changes

Type	Values Removed	Values Added
CPEs		cpe:2.3:a:ibm:websphere_application_server:::::-:::*

Sep 10, 2026 7:30 PM Scoring metrics updated View changes

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}`

Sep 10, 2026 6:45 PM Description updated. Title updated. First appearance in the feed. Weaknesses updated. Affected versions updated. Affected vendors updated. Added references. Scoring metrics updated View changes

Type	Values Removed	Values Added
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.
Title		IBM WebSphere Application Server prior to 9.0.5.29 and 8.5.5.31 are affected by multiple vulnerabilities
First Time appeared		Ibm Ibm websphere Application Server
Weaknesses		CWE-400
CPEs		cpe:2.3:a:ibm:websphere_application_server:8.5.0:::::::* cpe:2.3:a:ibm:websphere_application_server:8.5:::::::* cpe:2.3:a:ibm:websphere_application_server:9.0.0:::::::* cpe:2.3:a:ibm:websphere_application_server:9.0:::::::*
Vendors & Products		Ibm Ibm websphere Application Server
References		https://www.ibm.com/support/pages/node/7286610
Metrics		cvssV3_1 `{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L'}`