Description
IBM WebSphere Application Server and WebSphere Application Server Liberty are affected by a virtual host bypass vulnerability.
Published: 2026-09-18
Score: 6.5 Medium
EPSS: < 1% Very Low
KEV: No
AI Analysis

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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 https://www.ibm.com/support/pages/node/7285876 (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.  For IBM WebSphere Application Server Liberty 17.0.0.3 - 26.0.0.8: · Apply Liberty Fix Pack 26.0.0.9 https://www.ibm.com/support/pages/node/7285875 (availability September 2026) or later fix pack.

Tracking

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Advisories

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History

Fri, 18 Sep 2026 21:30:00 +0000

Type Values Removed Values Added
Description IBM WebSphere Application Server and WebSphere Application Server Liberty are affected by a virtual host bypass vulnerability.
Title Multiple security vulnerabilities may affect IBM WebSphere Liberty that is shipped with IBM CICS TX Advanced.
First Time appeared Ibm
Ibm cics Tx Advanced
Weaknesses CWE-284
CPEs cpe:2.3:a:ibm:cics_tx_advanced:10.1.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:cics_tx_advanced:10.1:*:*:*:*:*:*:*
Vendors & Products Ibm
Ibm cics Tx Advanced
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'}

ssvc

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


Subscriptions

Ibm Cics Tx Advanced
cve-icon MITRE

Status: PUBLISHED

Assigner: ibm

Published:

Updated: 2026-10-22T18:53:28.715Z

Reserved: 2026-06-08T03:27:16.708Z

Link: CVE-2026-11549

cve-icon Vulnrichment

Updated: 2026-09-18T19:45:34.492Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-09-18T20:17:00.923

Modified: 2026-10-22T19:17:49.217

Link: CVE-2026-11549

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-09-20T01:00:11Z

Weaknesses