CVE-2026-43827
Fixed upstream EPSS <1%CVSS 5.9
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.
Products: Apache Software Foundation Apache Shiro
Fixed upstream
| Ecosystem | Package | Fixed in |
|---|---|---|
| Maven | org.apache.shiro:shiro-core | 2.2.0 |
| Maven | org.apache.shiro:shiro-core | 3.0.0-alpha-2 |
Distro releases
| Release | Package | Fixed in |
|---|---|---|
| Chainguard | apache-activemq-5.19 | no fix |
| Chainguard | apache-activemq-6.1 | no fix |
| Chainguard | apache-activemq-fips-5.19 | no fix |
| Chainguard | apache-activemq-fips-6.1 | no fix |
| Chainguard | neo4j-2025.11 | no fix |
| Chainguard | neo4j-2025.12 | no fix |
| Chainguard | neo4j-2026.01 | no fix |
| Chainguard | neo4j-2026.02 | no fix |
| Chainguard | neo4j-2026.03 | no fix |
| Chainguard | neo4j-2026.04 | no fix |
| Chainguard | opensearch-2-identity-shiro | no fix |
| Debian 12 | shiro | no fix |
| Debian 13 | shiro | no fix |
| Debian 14 | shiro | no fix |
| Ubuntu 20.04 LTS | shiro | no fix |
| Ubuntu 22.04 LTS | shiro | no fix |
| Ubuntu 25.10 | shiro | no fix |
| Ubuntu 26.04 LTS | shiro | no fix |
| Ubuntu 26.10 | shiro | no fix |
| Ubuntu Pro 16.04 LTS | shiro | no fix |
| Ubuntu Pro 18.04 LTS | shiro | no fix |
| Ubuntu Pro 24.04 LTS | shiro | no fix |
| Wolfi | neo4j-2025.12 | no fix |
| Wolfi | neo4j-2026.01 | no fix |