CVE-2026-11710

IBM WebSphere Application Server is affected by an HTTP request smuggling vulnerability

Published Sep 18, 2026 CVSS 3.1 · 6.5 Medium EPSS < 1% KEV · Not listed
Description
IBM WebSphere Application Server 8.5 is affected by an HTTP request smuggling vulnerability due to improper handling of Content-Length headers.

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 PH71679. For IBM WebSphere Application Server traditional: 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.  Additional interim fixes may be available and linked off the interim fix download page.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

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

Type Values Removed Values Added
Description IBM WebSphere Application Server 8.5 is affected by an HTTP request smuggling vulnerability due to improper handling of Content-Length headers.
Title IBM WebSphere Application Server is affected by an HTTP request smuggling vulnerability
First Time appeared Ibm
Ibm websphere Application Server
Weaknesses CWE-444
CPEs cpe:2.3:a:ibm:websphere_application_server:8.5.0:*:*:*:*:*:*:*
cpe:2.3:a:ibm:websphere_application_server:8.5:*:*:*:*:*:*:*
Vendors & Products Ibm
Ibm websphere Application Server
References
Metrics cvssV3_1

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

Weaknesses

Sources

Status
PUBLISHED
Assigner
ibm
Published
Updated
Sep 19, 2026, 2:11 PM
Reserved
Jun 8, 2026, 11:57 PM
Status
Awaiting Analysis
Published
Sep 18, 2026, 8:17 PM
Modified
Sep 22, 2026, 7:32 PM