CVE-2026-48589: Apache Shiro: Jakarta EE open redirect via untrusted Referer in post-login redirect flow

[Lenny Primak <lprimak () apache org>]

Severity: 

Affected versions:

- Apache Shiro (org.apache.shiro:shiro-jakarta-ee) 2.0.0-alpha-0 through 2.2.0
- Apache Shiro (org.apache.shiro:shiro-jakarta-ee) 3.0.0-alpha-0 through 3.0.0-alpha-1

Description:

Apache Shiro’s Jakarta EE module used the HTTP Referer header in certain cases to issue redirect after a user login.
In affected versions, insufficient validation of this client-controlled value could allow an attacker to influence the 
redirect target in applications using the Jakarta EE module.
This issue affects Apache Shiro from 2.0-alpha to 2.2.0, and 3.0.0-alpha-1, only when using shiro-jakarta-ee 
integration module.

Credit:

Bartlomiej Dmitruk <bartek () striga ai> (finder)
Lenny Primak <lenny () flowlogix com> (remediation developer)

References:

https://shiro.apache.org/security-reports.html#cve_2026_48589
https://shiro.apache.org/
https://www.cve.org/CVERecord?id=CVE-2026-48589