Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Apache | Shiro | < 2.0.7 |
Related Weaknesses (CWE)
References
- https://lists.apache.org/thread/5jjf0hnjcol58z2m5y255c7scz1lnp8kMailing ListVendor Advisory
- http://www.openwall.com/lists/oss-security/2026/02/08/1Mailing ListThird Party Advisory
FAQ
What is CVE-2026-23903?
CVE-2026-23903 is a vulnerability with a CVSS score of 5.3 (MEDIUM). 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 i...
How severe is CVE-2026-23903?
CVE-2026-23903 has been rated MEDIUM with a CVSS base score of 5.3/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-23903?
Check the references section above for vendor advisories and patch information. Affected products include: Apache Shiro.