Description
IBM WebSphere Application Server 8.5 and 9.0, and IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.8 are vulnerable to HTTP request smuggling.
Published: 2026-09-18
Score: 4.8 Medium
EPSS: < 1% Very Low
KEV: No
Impact: HTTP request smuggling vulnerability
Action: Patch Immediately
AI Analysis

Impact

The CVE description states that IBM WebSphere Application Server 8.5, 9.0, and WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.8 are vulnerable to HTTP request smuggling. HTTP request smuggling is a technique that allows a malicious actor to manipulate the parsing of HTTP request boundaries, potentially resulting in misinterpretation of requests by the server. This weakness is classified as CWE-444.

Affected Systems

The vulnerability affects IBM WebSphere Application Server 8.5, 9.0, and IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.8. No other product versions are listed in the CNA data.

Risk and Exploitability

The CVSS base score is 4.8, which is categorized as medium severity. The EPSS score of < 1% indicates a very low likelihood of exploitation, and the issue is not listed in CISA KEV. The flaw permits manipulation of HTTP request boundary handling; the likely attack vector is remote HTTP traffic, as an attacker would need to craft specially formatted requests to trigger request smuggling. While the severity is moderate, the very low exploitation probability suggests operators can prioritize patching alongside monitoring of suspicious HTTP traffic.

Generated by OpenCVE AI on October 23, 2026 at 07:49 UTC.

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.


OpenCVE Recommended Actions

  • Apply the IBM recommended fix pack for the specific WebSphere Application Server version.
  • Restart WebSphere services to load the patched binaries and configuration.
  • Implement network perimeter controls to detect and block malformed HTTP requests that could facilitate request smuggling.

Generated by OpenCVE AI on October 23, 2026 at 07:49 UTC.

Tracking

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Advisories

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History

Fri, 23 Oct 2026 00:45:00 +0000

Type Values Removed Values Added
Description IBM WebSphere Application Server 8.5 and 9.0 are vulnerable to HTTP request smuggling. IBM WebSphere Application Server 8.5 and 9.0, and IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.8 are vulnerable to HTTP request smuggling.
Title IBM WebSphere Application Server HTTP Request Smuggling IBM WebSphere Application Server and IBM WebSphere Application Server - Liberty HTTP Request Smuggling
First Time appeared Ibm websphere Application Server Liberty
CPEs cpe:2.3:a:ibm:websphere_application_server_liberty:17.0.0.3:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server_liberty:26.0.0.8:*:*:*:*:*:*:*
Vendors & Products Ibm websphere Application Server Liberty
References

Thu, 22 Oct 2026 18:30:00 +0000

Type Values Removed Values Added
Description IBM WebSphere Application Server 8.5, 9.0, and Liberty are vulnerable to HTTP request smuggling. IBM WebSphere Application Server 8.5 and 9.0 are vulnerable to HTTP request smuggling.
Title Multiple security vulnerabilities may affect IBM WebSphere Liberty that is shipped with IBM CICS TX Advanced. IBM WebSphere Application Server HTTP Request Smuggling
First Time appeared Ibm websphere Application Server
CPEs cpe:2.3:a:ibm:cics_tx_advanced:10.1.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:cics_tx_advanced:10.1:*:*:*:*:*:*:*
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 websphere Application Server
References

Wed, 30 Sep 2026 17:45:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 4.2, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N'}

cvssV3_1

{'score': 4.8, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N'}


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

Type Values Removed Values Added
Metrics ssvc

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


Fri, 18 Sep 2026 16:15:00 +0000

Type Values Removed Values Added
Description IBM WebSphere Application Server 8.5, 9.0, and Liberty are vulnerable to HTTP request smuggling.
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-444
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': 4.2, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N'}


Subscriptions

Ibm Cics Tx Advanced Websphere Application Server Websphere Application Server Liberty
cve-icon MITRE

Status: PUBLISHED

Assigner: ibm

Published:

Updated: 2026-10-22T18:53:06.516Z

Reserved: 2026-06-04T11:45:44.144Z

Link: CVE-2026-10841

cve-icon Vulnrichment

Updated: 2026-09-18T17:24:46.658Z

cve-icon NVD

Status : Undergoing Analysis

Published: 2026-09-18T16:17:05.027

Modified: 2026-10-22T19:17:35.350

Link: CVE-2026-10841

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-23T08:00:17Z

Weaknesses
  • CWE-444

    Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')