Severity: Affected versions:
- Apache Shiro (org.apache.shiro:shiro-core) 1.0 through 2.1.0 - Apache Shiro (org.apache.shiro:shiro-core) 3.0.0-alpha-0 through 3.0.0-alpha-1 Description: Default configurations of Apache Shiro have a session fixation vulnerability. This issue affects Apache Shiro from 1.0 to 2.1.0, and 3.0.0-alpha-1. Users are recommended to upgrade to version 2.1.1, or 3.0.0-alpha-2 or later, which fixes the issue. In the affected versions, when a session already exists, it is not invalidated upon successful login, nor is a new session being generated with a new ID. Credit: Rasmus Moorats <[email protected]> (finder) Lenny Primak <[email protected]> (remediation developer) References: https://shiro.apache.org/ https://www.cve.org/CVERecord?id=CVE-2026-43827
