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CVE-2026-43827

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

CVSS 5.9 MEDIUMEPSS 0.4%CWE-384
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: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
Produtos afetados
Apache Software Foundation · Apache Shiro

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Referências
https://shiro.apache.org/security-reports.html#cve_2026_43827http://www.openwall.com/lists/oss-security/2026/05/25/6