Medium 5.9Published May 25, 2026

CVE-2026-43827Apache Shiro: Session fixation: new session is not created after login by default

Updated under an hour ago (Oct 26, 2026, 9:00 PM ET)

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It affects Apache Software Foundation Apache Shiro and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Apache Software Foundation Apache Shiro

Exploited in the last 30 days

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: 5.9 MEDIUM (v4.0, CNA)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
Weakness (CWE): CWE-384
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: apache
NVD analysis: Analyzed
Record last updated: May 26, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Apache Software Foundation Apache Shiro apache_software_foundation:apache_shiro (from the name)	from 1.0 through 2.1.0; from 3.0.0-alpha-0 through 3.0.0-alpha-1	CNA record
apache shiro apache:shiro	before 2.1.1; 3.0.0	NVD

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.