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.
Published: 2026-05-25
Score: 5.9 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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History

Thu, 28 May 2026 14:00:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:apache:shiro:*:*:*:*:*:*:*:*
cpe:2.3:a:apache:shiro:3.0.0:alpha1:*:*:*:*:*:*
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N'}


Wed, 27 May 2026 10:30:00 +0000

Type Values Removed Values Added
First Time appeared Apache
Apache shiro
Vendors & Products Apache
Apache shiro

Tue, 26 May 2026 13:45:00 +0000

Type Values Removed Values Added
References

Tue, 26 May 2026 13:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 25 May 2026 20:45:00 +0000

Type Values Removed Values Added
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.
Title Apache Shiro: Session fixation: new session is not created after login by default
Weaknesses CWE-384
References
Metrics cvssV4_0

{'score': 5.9, '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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: apache

Published:

Updated: 2026-05-26T12:39:39.186Z

Reserved: 2026-05-02T22:26:19.626Z

Link: CVE-2026-43827

cve-icon Vulnrichment

Updated: 2026-05-25T21:26:12.053Z

cve-icon NVD

Status : Analyzed

Published: 2026-05-25T21:16:34.700

Modified: 2026-06-17T10:49:58.950

Link: CVE-2026-43827

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-27T10:05:56Z

Weaknesses