🛡️ CVE-2026-23903
🟡 CVSS 5.3 — Medium ✅ No Known Exploit CWE-289 NVD
5.3
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

Authentication Bypass by Alternate Name vulnerability in Apache Shiro. This issue affects Apache Shiro: before 2.0.7. Users are recommended to upgrade to version 2.0.7, which fixes the issue. The issue only effects static files. If static files are served from a case-insensitive filesystem, such as default macOS setup, static files may be accessed by varying the case of the filename in the request. If only lower-case (common default) filters are present in Shiro, they may be bypassed this way. Shiro 2.0.7 and later has a new parameters to remediate this issue shiro.ini: filterChainResolver.caseInsensitive = true application.propertie: shiro.caseInsensitive=true Shiro 3.0.0 and later (upcoming) makes this the default.

Details

Severity Medium
CVSS Score 5.3
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CWE CWE-289
Public Exploit ✅ No
Source NVD
Published 2026-02-09
Updated 2026-06-02
Modified 2026-04-09
Fix URL N/A

Affected Packages

Software From version Fixed in
org.apache.shiro:shiro-spring 2.1.0
shiro 2.0.7

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