What is CVE-2026-17390?

CVE-2026-17390 is a medium-severity vulnerability in IBM API Connect, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-11-07.

How severe is CVE-2026-17390?

Medium severity. CVSS v3 base score is 6.4 out of 10.

XSS in IBM API Connect

CVE-2026-17390

IBM API Connect 10.0.8.0 through 10.0.8.12 and 12.1.0.0 through 12.1.1.2 could allow an authenticated user to execute arbitrary JavaScript in the web UI due to cross-site scripting. This could alter the intended functionality of the page and potentially lead to credential disclosure within a trusted session.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-11-07 · last modified 2026-11-07.

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

IBM API Connect

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.ibm.com/support/pages/node/7295635 (vendor-advisory, patch)
www.ibm.com/support/pages/node/7295637 (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-17390?: CVE-2026-17390 is a medium-severity vulnerability in IBM API Connect, classified under Cross-site Scripting. CVSS score: 6.4/10. Published 2026-11-07.
How severe is CVE-2026-17390?: Medium severity. CVSS v3 base score is 6.4 out of 10.