Inconsistent interpretation of HTTP requests in IBM WebSphere Application Server Liberty - CVE-2026-11806

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Main Vulnerability Database Vulnerabilities #VU137316

Inconsistent interpretation of HTTP requests in IBM WebSphere Application Server Liberty - CVE-2026-11806

Published: July 10, 2026


Vulnerability identifier: #VU137316
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-11806
CWE-ID: CWE-444
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: IBM Corporation
Affected software:
IBM WebSphere Application Server Liberty

Detailed vulnerability description

The vulnerability allows a remote privileged user to perform HTTP request smuggling attacks.

The vulnerability exists due to improper validation of HTTP requests with the restConnector-2.0 feature enabled. A remote privileged user can send a specially crafted HTTP request to the server and smuggle arbitrary HTTP headers.

Successful exploitation of vulnerability may allow an attacker to poison HTTP cache and perform phishing attacks.


How to mitigate CVE-2026-11806

Install updates from vendor's website.

Sources