🛡️ CVE-2026-43827 on Ubuntu — shiro

⚪ Unknown ✅ No Known Exploit OSV
N/A
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

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.

Distribution advisory

This page covers CVE-2026-43827 as tracked by Ubuntu, for the package shiro. No fixed version has been recorded for this distribution yet.

How this vulnerability can be exploited

This issue can be reached over the network, attack complexity is low, an attacker needs no privileges on the target. A user must be tricked into taking some action. The scope is unchanged, so the impact stays within the vulnerable component. Rated impact: confidentiality high, integrity none, availability none.

Affected software and timeline

Affected software: shiro. Published on 25 May 2026 and last revised on 29 May 2026. No public exploit is currently recorded for this entry. Record sourced from OSV.

References

ubuntu.com (Report)
www.cve.org (Report)
www.openwall.com (Report)
shiro.apache.org (Report)
www.openwall.com (Report)

CVE-2026-43827 on other distributions

Each distribution ships its own build and its own fixed version. Pick the one you run:

Details

Severity Unknown
CVSS Score N/A
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N
CWE N/A
Public Exploit ✅ No
Source OSV
Published 2026-05-25
Updated 2026-06-02
Modified 2026-05-29
Fix URL N/A

Affected Packages

Software From version Fixed in
shiro — —

Similar Threats

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More UBUNTU CVE 2026 advisories

Part of UBUNTU CVE 2026 in the advisory index.