CVE-2026-43827
published 2026-05-25CVE-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…
PriorityP434medium6.5CVSS 3.1
AVNACLPRNUIRSUCHINAN
EPSS
0.41%
33.2th percentile
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.
Affected
4 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| apache | shiro | < 2.1.1 | 2.1.1 |
| apache | shiro | — | — |
| apache_software_foundation | apache_shiro | 1.0 – 2.1.0 | — |
| apache_software_foundation | apache_shiro | 3.0.0-alpha-0 – 3.0.0-alpha-1 | — |
CVSS provenance
nvdv3.16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
nvdv4.05.9MEDIUMCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:U/V:X/RE:L/U:Amber
cvelistv5v4.05.9MEDIUMCVSS: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
vendor_redhat6.5MEDIUM
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GHSA
Apache Shiro has a session fixation vulnerability
ghsa·2026-05-26
CVE-2026-43827 [MEDIUM] CWE-384 Apache Shiro has a session fixation vulnerability
Apache Shiro has a session fixation vulnerability
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.
GHSA
GHSA-fcvm-3cpj-f9qx: Default configurations of Apache Shiro have a session fixation vulnerability
ghsa_unreviewed·2026-05-26
CVE-2026-43827 [MEDIUM] CWE-384 GHSA-fcvm-3cpj-f9qx: Default configurations of Apache Shiro have a session fixation vulnerability
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.
CVEList
Apache Shiro: Session fixation: new session is not created after login by default
cvelistv5·2026-05-25·CVSS 5.9
CVE-2026-43827 [MEDIUM] CWE-384 Apache Shiro: Session fixation: new session is not created after login by default
Apache 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 invalidated upon successful login, nor is a new session being generated with a new ID.
Red Hat
apache-shiro: Apache Shiro: Session fixation vulnerability due to improper session invalidation upon login
vendor_redhat·2026-05-25·CVSS 6.5
CVE-2026-43827 [MEDIUM] CWE-613 apache-shiro: Apache Shiro: Session fixation vulnerability due to improper session invalidation upon login
apache-shiro: Apache Shiro: Session fixation vulnerability due to improper session invalidation upon login
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.
A flaw was found in Apache Shiro. This vulnerability, known as session fixation, allows an attacker to hijack a user's session. This occurs because the system fails to invalidate an existing session or generate a new session identifier after a user successfully logs in. Consequently, a r
No detection rules found.
No public exploits indexed.
2026-05-25
Published