CVE-2026-43827

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.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://shiro.apache.org/security-reports.html#cve_2026_43827	Vendor Advisory
http://www.openwall.com/lists/oss-security/2026/05/25/6	Mailing List Third Party Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:apache:shiro::::::::
	cpe:2.3:a:apache:shiro:3.0.0:alpha1::::::

History

28 May 2026, 13:47

Type	Values Removed	Values Added
First Time		Apache Apache shiro
CPE		cpe:2.3:a:apache:shiro:::::::: cpe:2.3:a:apache:shiro:3.0.0:alpha1::::::
References	~~() https://shiro.apache.org/security-reports.html#cve_2026_43827 -~~	() https://shiro.apache.org/security-reports.html#cve_2026_43827 - Vendor Advisory
References	~~() http://www.openwall.com/lists/oss-security/2026/05/25/6 -~~	() http://www.openwall.com/lists/oss-security/2026/05/25/6 - Mailing List, Third Party Advisory
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 6.5

25 May 2026, 22:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-25 21:16

Updated : 2026-05-28 13:47

NVD link : CVE-2026-43827

Mitre link : CVE-2026-43827

CVE.ORG link : CVE-2026-43827

JSON object : View

Products Affected

apache

shiro

CWE

CWE-384

Session Fixation

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