Vulnerability · Published Apr 22, 2026 · Assigned by ibm

CVE-2026-3621IBM WebSphere Application Server Liberty is affected by identity spoofing

High 7.5

In plain English

A high-severity privilege mismanagement in WebSphere Application Server - Liberty from IBM. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 20% of all known vulnerabilities).

Severity (CVSS 3.1)7.5High

Exploit odds (30 days)0.3%top 79.9% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
IBM	WebSphere Application Server - Liberty	17.0.0.3 – through 26.0.0.4

Weakness: CWE-269 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

References

https://www.ibm.com/support/pages/node/7270437 vendor-advisory, patch