CVE-2026-16186
Received Received - Intake

Reflected XSS in IBM WebSphere Application Server

Publication date: 2026-09-14

Last updated on: 2026-09-14

Assigner: IBM Corporation

Description
IBM WebSphere Application Server 9.0, and 8.5 is affected by a reflected cross-site scripting vulnerability.

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Meta Information

Published
2026-09-14
Last Modified
2026-09-14
Generated
2026-09-15
AI Q&A
2026-09-14
EPSS Evaluated
N/A
NVD
CVE-2026-16186

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
ibm websphere_application_server 9.0
ibm websphere_application_server 8.5

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-79 The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.

Attack-Flow Graph

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Executive Summary

This is a reflected cross-site scripting (XSS) vulnerability in IBM WebSphere Application Server versions 9.0 and 8.5. It allows attackers to inject malicious scripts into web pages viewed by users, which are then executed in the context of the user's browser.

Detection Guidance

Detecting this reflected cross-site scripting (XSS) vulnerability in IBM WebSphere Application Server requires checking for improper input validation in web responses. Manually test by sending crafted URLs with script tags to application endpoints and observe if the script executes in the browser. Use tools like Burp Suite or OWASP ZAP to automate detection by scanning for XSS flaws in WebSphere responses.

Impact Analysis

An attacker could exploit this to steal sensitive user data like cookies or session tokens, perform actions on behalf of users, or deface websites. Users accessing affected servers may have their sessions compromised or be redirected to malicious sites.

Compliance Impact

This vulnerability could lead to unauthorized access to personal data, violating GDPR's data protection requirements. For HIPAA, it may expose protected health information, risking compliance with security rules. Organizations must address it to maintain regulatory compliance.

Mitigation Strategies

Apply the latest IBM WebSphere Application Server security patches or updates provided by IBM to address the reflected cross-site scripting vulnerability.

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