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.
Published: 2026-06-22
Score: 5.9 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

Vendor Solution

IBM strongly recommends addressing the vulnerability now by applying a currently available interim fix or fix pack that contains the fix for APAR PH71631 and PH71370. To determine if a feature is enabled for WebSphere Application Server Liberty, refer to  How to determine if Liberty is using a specific feature https://www.ibm.com/support/pages/node/6553910 .  For IBM WebSphere Application Server Liberty 17.0.0.3 - 26.0.0.6 using the servlet-3.0, servlet-3.1, servlet-4.0, servlet-5.0, servlet-6.0, servlet-6.1, websocket-1.0, websocket-1.1, websocket-2.0, websocket-2.1, or websocket-2.2 feature: · Upgrade to minimal fix pack levels as required by the interim fix and then apply the Interim Fix that resolves PH71631 https://www.ibm.com/support/pages/node/7276381 --OR-- · Apply Fix Pack 26.0.0.7 or later (targeted availability 3Q2026). For IBM WebSphere Application Server traditional: For V9.0.0.0 through 9.0.5.28: · Upgrade to minimal fix pack levels as required by the interim fix and then apply the Interim Fix that resolves PH71370 https://www.ibm.com/support/pages/node/7276399 --OR-- · Apply Fix Pack 9.0.5.29 or later (targeted availability 3Q2026).   For V8.5.0.0 through 8.5.5.29: · Upgrade to minimal fix pack levels as required by interim fix and then apply Interim Fix that resolves PH71370 https://www.ibm.com/support/pages/node/7276399 --OR-- · Apply Fix Pack 8.5.5.30 or later (targeted availability 3Q2026). Additional interim fixes may be available and linked off the interim fix download page.

Tracking

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Advisories

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History

Mon, 22 Jun 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Mon, 22 Jun 2026 15:45:00 +0000

Type Values Removed Values Added
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.
Title IBM WebSphere Application Server and WebSphere Application Server Liberty are affected by multiple vulnerabilities
First Time appeared Ibm
Ibm websphere Application Server
Ibm websphere Application Server Liberty
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:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server___liberty:17.0.0.3:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server___liberty:26.0.0.6:*:*:*:*:*:*:*
Vendors & Products Ibm
Ibm websphere Application Server
Ibm websphere Application Server Liberty
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'}

Subscriptions

Ibm Websphere Application Server Websphere Application Server Liberty
cve-icon MITRE

Status: PUBLISHED

Assigner: ibm

Published:

Updated: 2026-06-22T16:05:22.609Z

Reserved: 2026-05-22T20:33:33.213Z

Link: CVE-2026-9320

cve-icon Vulnrichment

Updated: 2026-06-22T16:05:19.558Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-06-22T19:00:13Z

Weaknesses