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 · last modified .
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
EPSS: 0.003 (17.9th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 18th percentile — 17.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
The 30-day trend appears once there are two daily scores.
Affected products
Weakness classification (CWE)
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.