CVE-2026-43827CWE-384

Apache Shiro: Session fixation: new session is not created after login by default

Medium · published May 25, 2026

CVSS v4.0
5.9
EPSS
1%
Percentile
44.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
5.9 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N/AU:Y/R:U/RE:L/U:Amber
EPSS
0.00530 · 44.0th percentile
Weakness
CWE-384 · Session Fixation
Published
2026-05-25T20:19Z
EPSS history
Timeline
  • 25 MAY 20:19Z
    Apache Shiro: Session fixation: new session is not created after login by default
    cvelistv5