What is CVE-2026-15091?

CVE-2026-15091 is a critical-severity vulnerability in IBM Engineering Ai Hub, classified under Cross-site Scripting. CVSS score: 9.3/10. Published 2026-07-17.

How severe is CVE-2026-15091?

Critical severity. CVSS v3 base score is 9.3 out of 10.

XSS in IBM Engineering Ai Hub

CVE-2026-15091

IBM Engineering AI Hub 1.0.0, 1.1.0, and 1.2.0 could allow a remote attacker to execute arbitrary scripts due to improper neutralization of input during web page generation.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-07-17 · last modified 2026-07-24.

CVSS v3 metric

CVSS v3 base score 9.3 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:N.

EPSS exploit prediction

EPSS: 0.006 (45.8th percentile), scored 2026-10-16.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 46th percentile — 45.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000

Affected products

IBM Engineering Ai Hub — versions 1.0.0, 1.1.0, 1.2.0
IBM Engineering Ai Hub

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.ibm.com/support/pages/node/7279964 (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-15091?: CVE-2026-15091 is a critical-severity vulnerability in IBM Engineering Ai Hub, classified under Cross-site Scripting. CVSS score: 9.3/10. Published 2026-07-17.
How severe is CVE-2026-15091?: Critical severity. CVSS v3 base score is 9.3 out of 10.