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.
Affected software
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| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | org.apache.shiro:shiro-core | >= 1.0.0-incubating, < 2.2.0, >= 3.0.0-alpha-1, < 3.0.0-alpha-2 | 2.2.0, 3.0.0-alpha-2 |
References
- CVSS 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/RE:L/U:Amber- Weakness (CWE)
CWE-384- Platform
- Java / Kotlin (Maven)
- Package
org.apache.shiro:shiro-core- Disclosed
- 26.05.2026
- Updated
- 11.10.2026 12:22
Sources and licenses
OSV / GitHub Advisory Database - GHSA-fcvm-3cpj-f9qx - CC BY 4.0
Vulnerability history: org.apache.shiro:shiro-core
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 12
- First → latest
- 02.2020 06.2026
- Without a fix
- 0
- Exploited in attacks
- 1
Severity breakdown
- Critical 6
- High 3
- Medium 2
- Low 1
Disclosures per year
- 2020: 1
- 2021: 4
- 2022: 3
- 2023: 0
- 2024: 1
- 2025: 0
- 2026: 3
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Apache Shiro has a session fixation vulnerability this entry
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