CVE-2025-36047

IBM WebSphere Application Server Liberty denial of service

Published Aug 14, 2025 CVSS 3.1 · 5.3 Medium EPSS < 1% KEV · Not listed
Description
IBM WebSphere Application Server Liberty 18.0.0.2 through 25.0.0.8 is 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.

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 PH66953. To determine if a feature is enabled for IBM WebSphere Application Server Liberty, refer to How to determine if Liberty is using a specific feature. To determine if the HTTP/2 protocol is enabled with Liberty Servlet features see HTTP/2 Support for Liberty. For IBM WebSphere Application Server Liberty 18.0.0.2 - 25.0.0.8 using the servlet-3.1, servlet-4.0, servlet-5.0, or servlet-6.0 feature(s) with the HTTP/2 protocol enabled: · Upgrade to minimal fix pack levels as required by the interim fix and then apply the Interim Fix that resolves PH66953 --OR-- · Apply Liberty Fix Pack 25.0.0.9 or later (targeted availability 3Q2025). Additional interim fixes may be available and linked off the interim fix download page.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2025-24866 IBM WebSphere Application Server Liberty 18.0.0.2 through 25.0.0.8 is 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.
History
Type Values Removed Values Added
First Time appeared Apple
Apple macos
Ibm aix
Ibm i
Ibm z\/os
Linux
Linux linux Kernel
Microsoft
Microsoft windows
CPEs cpe:2.3:a:ibm:websphere_application_server:*:*:*:*:liberty:*:*:*
cpe:2.3:o:apple:macos:-:*:*:*:*:*:*:*
cpe:2.3:o:ibm:aix:-:*:*:*:*:*:*:*
cpe:2.3:o:ibm:i:-:*:*:*:*:*:*:*
cpe:2.3:o:ibm:z\/os:-:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:-:*:*:*:*:*:*:*
cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*
Vendors & Products Apple
Apple macos
Ibm aix
Ibm i
Ibm z\/os
Linux
Linux linux Kernel
Microsoft
Microsoft windows
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description IBM WebSphere Application Server Liberty 18.0.0.2 through 25.0.0.8 is 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 Liberty denial of service
First Time appeared Ibm
Ibm websphere Application Server
Weaknesses CWE-770
CPEs cpe:2.3:a:ibm:websphere_application_server:18.0.0.2:*:*:*:liberty:*:*:*
cpe:2.3:a:ibm:websphere_application_server:25.0.0.8:*:*:*:liberty:*:*:*
Vendors & Products Ibm
Ibm websphere Application Server
References
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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
ibm
Published
Updated
Nov 3, 2025, 7:54 PM
Reserved
Apr 15, 2025, 9:16 PM
Status
Modified
Published
Aug 14, 2025, 4:15 PM
Modified
Jun 17, 2026, 9:14 AM