What is CVE-2026-5516?

CVE-2026-5516 is a medium-severity vulnerability in Ibm Websphere_application_server, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 4.4/10. Published 2026-05-27.

How severe is CVE-2026-5516?

Medium severity. CVSS v3 base score is 4.4 out of 10.

Vulnerability in Ibm Websphere_application_server

CVE-2026-5516

IBM WebSphere Application Server - Liberty 22.0.0.11 through 26.0.0.5 IBM WebSphere Application Server Liberty could allow a remote attacker to bypass security under limited conditions by exploiting a specific timing window.

Vulnerability class: Race Condition

EPSS: 0.000 (13.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:N/A:N.

Affected products

Ibm Websphere_application_server
Ibm Websphere Application Server - Liberty — versions 22.0.0.11

Weakness classification (CWE)

CWE-362 — Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition)

References

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

Frequently asked questions

What is CVE-2026-5516?: CVE-2026-5516 is a medium-severity vulnerability in Ibm Websphere_application_server, classified under Concurrent Execution using Shared Resource with Improper Synchronization (Race Condition). CVSS score: 4.4/10. Published 2026-05-27.
How severe is CVE-2026-5516?: Medium severity. CVSS v3 base score is 4.4 out of 10.