CVE-2026-3621

Name: CVE-2026-3621
Creator: NVD / NIST
Published: 2026-04-23T00:16:45.313+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.9/10EPSS 0.28%

Last modified Jun 17, 2026

CVE-2026-3621 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. 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 authorization configured.. EPSS estimates a 0.28% chance of exploitation in the next 30 days.

Description

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 authorization configured.

Metrics

CVSS 3.1

5.9/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS Probability

0.28%

19.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-269

Affected Software

Vendor	Product	Versions
Ibm	Websphere Application Server	>= 17.0.0.3, < 26.0.0.5

References

https://www.ibm.com/support/pages/node/7270437Vendor Advisory

Timeline

Published: Apr 23, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-3621?

How severe is CVE-2026-3621?

CVE-2026-3621 has a CVSS score of 5.9/10 (MEDIUM severity). The EPSS model estimates a 0.28% probability of exploitation in the next 30 days.

How do I fix CVE-2026-3621?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-3621?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST