Cyber Resilience

CVE-2026-11594

High

Published: 30 June 2026

Published
30 June 2026
Modified
02 July 2026
KEV Added
—
Patch
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CVSS Score v3.1 8.5 CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N
EPSS Score 0.0034 25.7th percentile
Risk Priority 55 floored blend · peak EPSS

Summary

CVE-2026-11594 is a high-severity Cross-site Scripting (CWE-79) vulnerability in Ibm Websphere Application Server. Its CVSS base score is 8.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 25.7th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

OWASP Top 10 for Web (2025)

A05:2025 Injection

EU & UK References

Vulnerability details

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

CWE(s)
CWE-79

Related Threats

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access
Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.
attack.mitre.org →
T1185 Browser Session Hijacking Collection
Adversaries may take advantage of security vulnerabilities and inherent functionality in browser software to change content, modify user-behaviors, and intercept information as part of various browser session hijacking techniques.
attack.mitre.org →
Why these techniques?

XSS vuln (CWE-79) in admin console directly enables web app exploitation (T1190) and facilitates browser session hijacking via injected scripts (T1185).

Confidence: MEDIUM · MITRE ATT&CK Enterprise v19.0

CVEs Like This One

CVE-2021-20447Same vendor: Ibm
CVE-2021-38952Same vendor: Ibm
CVE-2021-29744Same vendor: Ibm
CVE-2020-4825Same vendor: Ibm
CVE-2020-4707Same vendor: Ibm
CVE-2021-20364Same vendor: Ibm
CVE-2021-29775Same vendor: Ibm
CVE-2021-20481Same vendor: Ibm
CVE-2020-4987Same vendor: Ibm
CVE-2021-39059Same vendor: Ibm

Affected Assets

ibm
websphere application server
8.5.0.0 — 8.5.5.30 · 9.0.0.0 — 9.0.5.29

Mitigating Controls

Likely Mitigating Controls AI

Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.

CA-8 Penetration Testing
addresses: CWE-79

Penetration testing submits XSS payloads to web applications, detecting cross-site scripting flaws for subsequent remediation.

SI-10 Information Input Validation
addresses: CWE-79

Validates web inputs to reject script-related content that could produce XSS.

SI-15 Information Output Filtering
addresses: CWE-79

Output validation against expected content can reject or sanitize script content in generated web pages, reducing XSS exploitability.

References