CVE-2026-11541
IBM WebSphere Application Server and WebSphere Application Server Liberty are affected by HTTP request smuggling
Description
IBM WebSphere Application Server 9.0, and 8.5 and IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.6 are affected by an HTTP request smuggling vulnerability.
INFO
Published Date :
June 30, 2026, 10:16 p.m.
Last Modified :
July 2, 2026, 5:55 p.m.
Remotely Exploit :
Yes !
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-11541
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS | 134c704f-9b21-4f2e-91b3-4a467353bcc0 | |||||
| CVSS 3.1 | HIGH | 9a959283-ebb5-44b6-b705-dcc2bbced522 | ||||
| CVSS 3.1 | HIGH | MITRE-CVE | ||||
| CVSS 3.1 | HIGH | [email protected] | ||||
| CVSS 3.1 | CRITICAL | [email protected] |
Solution
- Update IBM WebSphere Application Server to the latest version.
- Apply security patches for affected versions.
- Configure HTTP server for security.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-11541.
| URL | Resource |
|---|---|
| https://www.ibm.com/support/pages/node/7277550 | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-11541 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-11541
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-11541 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2026-11541 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jul. 02, 2026
Action Type Old Value New Value Added CVSS V3.1 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H Added CPE Configuration OR *cpe:2.3:a:ibm:websphere_application_server:*:*:*:*:traditional:*:*:* versions from (including) 9.0.0.0 up to (excluding) 9.0.5.29 *cpe:2.3:a:ibm:websphere_application_server:*:*:*:*:liberty:*:*:* versions from (including) 17.0.0.3 up to (including) 26.0.0.6 *cpe:2.3:a:ibm:websphere_application_server:*:*:*:*:traditional:*:*:* versions from (including) 8.5.0.0 up to (excluding) 8.5.5.31 Added Reference Type IBM Corporation: https://www.ibm.com/support/pages/node/7277550 Types: Vendor Advisory -
CVE Modified by 134c704f-9b21-4f2e-91b3-4a467353bcc0
Jul. 01, 2026
Action Type Old Value New Value Added SSVC {'id': 'CVE-2026-11541', 'role': 'CISA Coordinator', 'options': [{'exploitation': 'none'}, {'automatable': 'no'}, {'technicalImpact': 'total'}], 'version': '2.0.3', 'timestamp': '2026-07-01T14:52:04.153923Z'} -
New CVE Received by [email protected]
Jun. 30, 2026
Action Type Old Value New Value Added Affected [{'cpes': ['cpe:2.3:a:ibm:websphere_application_server:9.0:*:*:*:*:*:*:*', 'cpe:2.3:a:ibm:websphere_application_server:9.0.0:*:*:*:*:*:*:*', 'cpe:2.3:a:ibm:websphere_application_server:8.5:*:*:*:*:*:*:*', 'cpe:2.3:a:ibm:websphere_application_server:8.5.0:*:*:*:*:*:*:*'], 'vendor': 'IBM', 'product': 'WebSphere Application Server', 'versions': [{'status': 'affected', 'version': '9.0'}, {'status': 'affected', 'version': '8.5'}]}, {'cpes': ['cpe:2.3:a:ibm:websphere_application_server___liberty:17.0.0.3:*:*:*:*:*:*:*', 'cpe:2.3:a:ibm:websphere_application_server___liberty:26.0.0.6:*:*:*:*:*:*:*'], 'vendor': 'IBM', 'product': 'WebSphere Application Server - Liberty', 'versions': [{'status': 'affected', 'version': '17.0.0.3', 'versionType': 'semver', 'lessThanOrEqual': '26.0.0.6'}]}] Added Description IBM WebSphere Application Server 9.0, and 8.5 and IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.6 are affected by an HTTP request smuggling vulnerability. Added CVSS V3.1 AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N Added CWE CWE-444 Added Reference https://www.ibm.com/support/pages/node/7277550