CVE-2026-43827Apache Shiro: Session fixation: new session is not created after login by default
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 i…
Excerpt language: en. Shortened to 320 code points; full text retained locally.
Severity medium: primary CNA CVSS 5.9 v4.0 (worst CNA-provided scenario) Not listed in this KEV snapshot. Forecast present in this snapshot.
Published 2026-05-25T20:19:03.428Z. Updated 2026-05-26T12:39:39.186Z.