What is CVE-2026-3621?

CVE-2026-3621 is a high-severity vulnerability in Ibm Websphere_application_server, classified under Improper Privilege Management. CVSS score: 7.5/10. Published 2026-04-23.

How severe is CVE-2026-3621?

High severity. CVSS v3 base score is 7.5 out of 10.

Privilege escalation in Ibm Websphere_application_server

CVE-2026-3621

IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.4 IBM WebSphere Application Server Liberty is vulnerable to identity spoofing under limited conditions when an application is deployed without authentication and authorizat…

Vulnerability class: Privilege Escalation

EPSS: 0.000 (14.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Ibm Websphere_application_server
Ibm Websphere Application Server - Liberty — versions 17.0.0.3

Weakness classification (CWE)

CWE-269 — Improper Privilege Management

References

psirt@us.ibm.com (vendor-advisory, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-3621?: CVE-2026-3621 is a high-severity vulnerability in Ibm Websphere_application_server, classified under Improper Privilege Management. CVSS score: 7.5/10. Published 2026-04-23.
How severe is CVE-2026-3621?: High severity. CVSS v3 base score is 7.5 out of 10.