What is CVE-2026-11594?

CVE-2026-11594 is a high-severity vulnerability in IBM Websphere Application Server, classified under Cross-site Scripting. CVSS score: 8.5/10. Published 2026-06-30.

How severe is CVE-2026-11594?

High severity. CVSS v3 base score is 8.5 out of 10.

XSS in IBM Websphere Application Server

CVE-2026-11594

IBM WebSphere Application Server 9.0, and 8.5 is affected by a cross-site scripting vulnerability in the administrative console.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (7.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.5 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N.

Affected products

Ibm Websphere Application Server — versions 9.0, 8.5
Ibm Websphere_application_server

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

psirt@us.ibm.com (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-11594?: CVE-2026-11594 is a high-severity vulnerability in IBM Websphere Application Server, classified under Cross-site Scripting. CVSS score: 8.5/10. Published 2026-06-30.
How severe is CVE-2026-11594?: High severity. CVSS v3 base score is 8.5 out of 10.