CVE-2026-11594

HIGH

Published Jun 30, 2026 Modified Jul 2, 2026 CWE-79

Description

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

CVSS v3.1 Score

8.5

HIGH

CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N

EPSS — Exploit Prediction

0.0034

Probability of exploitation

0.26%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-79 Cross-site Scripting (XSS)

Affected Products

Vendor	Product	Versions
ibm	websphere_application_server	8.5.0.0 — 8.5.5.30
ibm	websphere_application_server	9.0.0.0 — 9.0.5.29

References

Advisories & Patches

https://www.ibm.com/support/pages/node/7277546

Frequently Asked Questions

What is CVE-2026-11594? +

IBM WebSphere Application Server 9.0, and 8.5 is affected by a cross-site scripting vulnerability in the administrative console. It has a CVSS v3.1 base score of 8.5 (HIGH).

How severe is CVE-2026-11594? +

CVE-2026-11594 has a CVSS v3.1 score of 8.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching. The EPSS score is 0.0034, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-11594? +

CVE-2026-11594 affects products from ibm, specifically: websphere_application_server. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-11594? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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