CVE-2026-9170

IBM HTTP Server is affected by multiple vulnerabilities

Published May 26, 2026 CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
Description
IBM HTTP Server 8.5, and 9.0 is vulnerable to denial of service and a potential remote code execution due to improper input validation.

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 PH71265. For IBM HTTP Server used by IBM WebSphere Application Server: 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 PH71265 https://www.ibm.com/support/pages/node/7239806 --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 the interim fix and then apply the Interim Fix that resolves PH71265 https://www.ibm.com/support/pages/node/7239806 --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. Important Note IBM strongly suggests that all System z customers be subscribed to the System z Security Portal to receive the latest critical System z security and integrity service. If you are not subscribed, see the instructions on the System z Security web site. Security and integrity APARs and associated fixes will be posted to this portal. IBM suggests reviewing the CVSS scores and applying all security or integrity fixes as soon as possible to minimize any potential risk.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Description IBM HTTP Server 8.5, and 9.0 IBM HTTP Server 8.5, and 9.0 is vulnerable to denial of service and a potential remote code execution due to improper input validation.
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N'}

ssvc

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

cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

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

Type Values Removed Values Added
CPEs cpe:2.3:a:ibm:http_server:8.5.0.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:http_server:9.0.0.0:*:*:*:*:*:*:*
Type Values Removed Values Added
Weaknesses CWE-444
References
Metrics ssvc

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

Type Values Removed Values Added
Description IBM Web Server Plug-ins for WebSphere Application Server and WebSphere Liberty 8.5, 9.0 IBM WebSphere Application Server and WebSphere Application Server Liberty are vulnerable to denial of service and a potential remote code execution due to improper input validation. IBM HTTP Server 8.5, and 9.0
Title IBM WebSphere Application Server and WebSphere Application Server Liberty are affected DOS and RCE. IBM HTTP Server is affected by multiple vulnerabilities
First Time appeared Ibm http Server
Weaknesses CWE-94
CPEs cpe:2.3:a:ibm:web_server_plug_ins_for_websphere_application_server_and_websphere_liberty:8.5.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:web_server_plug_ins_for_websphere_application_server_and_websphere_liberty:8.5:*:*:*:*:*:*:*
cpe:2.3:a:ibm:http_server:8.5.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:http_server:8.5:*:*:*:*:*:*:*
cpe:2.3:a:ibm:http_server:9.0.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:http_server:9.0:*:*:*:*:*:*:*
Vendors & Products Ibm http Server
References
Type Values Removed Values Added
Description IBM Web Server Plug-ins for WebSphere Application Server and WebSphere Liberty 8.5, 9.0 IBM WebSphere Application Server and WebSphere Application Server Liberty are vulnerable to denial of service and a potential remote code execution due to improper input validation.
Title IBM WebSphere Application Server and WebSphere Application Server Liberty are affected DOS and RCE.
First Time appeared Ibm
Ibm web Server Plug Ins For Websphere Application Server And Websphere Liberty
Weaknesses CWE-444
CPEs cpe:2.3:a:ibm:web_server_plug_ins_for_websphere_application_server_and_websphere_liberty:8.5.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:web_server_plug_ins_for_websphere_application_server_and_websphere_liberty:8.5:*:*:*:*:*:*:*
Vendors & Products Ibm
Ibm web Server Plug Ins For Websphere Application Server And Websphere Liberty
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
ibm
Published
Updated
Jun 11, 2026, 2:03 PM
Reserved
May 21, 2026, 2:32 PM
Status
Modified
Published
May 26, 2026, 6:16 PM
Modified
Jul 20, 2026, 8:10 PM