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Vulnerability Details CVE-2026-23903

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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.001
EPSS Ranking 19.1%
CVSS Severity
CVSS v3 Score 5.3
Products affected by CVE-2026-23903
  • Apache » Shiro » Version: N/A
    cpe:2.3:a:apache:shiro:-
  • Apache » Shiro » Version: 1.1.0
    cpe:2.3:a:apache:shiro:1.1.0
  • Apache » Shiro » Version: 1.10.0
    cpe:2.3:a:apache:shiro:1.10.0
  • Apache » Shiro » Version: 1.10.1
    cpe:2.3:a:apache:shiro:1.10.1
  • Apache » Shiro » Version: 1.11.0
    cpe:2.3:a:apache:shiro:1.11.0
  • Apache » Shiro » Version: 1.12.0
    cpe:2.3:a:apache:shiro:1.12.0
  • Apache » Shiro » Version: 1.13.0
    cpe:2.3:a:apache:shiro:1.13.0
  • Apache » Shiro » Version: 1.2.0
    cpe:2.3:a:apache:shiro:1.2.0
  • Apache » Shiro » Version: 1.2.1
    cpe:2.3:a:apache:shiro:1.2.1
  • Apache » Shiro » Version: 1.2.2
    cpe:2.3:a:apache:shiro:1.2.2
  • Apache » Shiro » Version: 1.2.3
    cpe:2.3:a:apache:shiro:1.2.3
  • Apache » Shiro » Version: 1.2.4
    cpe:2.3:a:apache:shiro:1.2.4
  • Apache » Shiro » Version: 1.2.5
    cpe:2.3:a:apache:shiro:1.2.5
  • Apache » Shiro » Version: 1.2.6
    cpe:2.3:a:apache:shiro:1.2.6
  • Apache » Shiro » Version: 1.3.0
    cpe:2.3:a:apache:shiro:1.3.0
  • Apache » Shiro » Version: 1.3.1
    cpe:2.3:a:apache:shiro:1.3.1
  • Apache » Shiro » Version: 1.3.2
    cpe:2.3:a:apache:shiro:1.3.2
  • Apache » Shiro » Version: 1.4.0
    cpe:2.3:a:apache:shiro:1.4.0
  • Apache » Shiro » Version: 1.4.1
    cpe:2.3:a:apache:shiro:1.4.1
  • Apache » Shiro » Version: 1.4.2
    cpe:2.3:a:apache:shiro:1.4.2
  • Apache » Shiro » Version: 1.5.0
    cpe:2.3:a:apache:shiro:1.5.0
  • Apache » Shiro » Version: 1.5.1
    cpe:2.3:a:apache:shiro:1.5.1
  • Apache » Shiro » Version: 1.5.2
    cpe:2.3:a:apache:shiro:1.5.2
  • Apache » Shiro » Version: 1.5.3
    cpe:2.3:a:apache:shiro:1.5.3
  • Apache » Shiro » Version: 1.6.0
    cpe:2.3:a:apache:shiro:1.6.0
  • Apache » Shiro » Version: 1.7.0
    cpe:2.3:a:apache:shiro:1.7.0
  • Apache » Shiro » Version: 1.7.1
    cpe:2.3:a:apache:shiro:1.7.1
  • Apache » Shiro » Version: 1.8.0
    cpe:2.3:a:apache:shiro:1.8.0
  • Apache » Shiro » Version: 1.9.0
    cpe:2.3:a:apache:shiro:1.9.0
  • Apache » Shiro » Version: 1.9.1
    cpe:2.3:a:apache:shiro:1.9.1
  • Apache » Shiro » Version: 2.0.0
    cpe:2.3:a:apache:shiro:2.0.0


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