CVE-2026-23903

MEDIUM

5.3

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.

CVE Details

CVSS v3.1 Score5.3

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Attack VectorNETWORK

ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

Published2/9/2026

Last Modified2/11/2026

Sourcenvd

Honeypot Sightings0

Affected Products

apache:shiro

Weaknesses (CWE)

CWE-289

References

https://lists.apache.org/thread/5jjf0hnjcol58z2m5y255c7scz1lnp8k(security@apache.org)

http://www.openwall.com/lists/oss-security/2026/02/08/1(af854a3a-2127-422b-91ae-364da2661108)

IOC Correlations

No correlations recorded

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