{"affected":[{"defaultStatus":"unaffected","ecosystem":"https://repo.maven.apache.org/maven2","packageName":"org.apache.shiro:shiro-web","product":"Apache Shiro","source":"CNA: apache","vendor":"Apache Software Foundation","versions":[{"lessThan":"2.0.7","status":"affected","version":"0","versionType":"semver"}]}],"cveId":"CVE-2026-23903","cwes":["CWE-289"],"description":"Authentication Bypass by Alternate Name vulnerability in Apache Shiro.\n\nThis issue affects Apache Shiro: before 2.0.7.\n\nUsers are recommended to upgrade to version 2.0.7, which fixes the issue.\n\nThe issue only effects static files. If static files are served from a case-insensitive filesystem,\nsuch as default macOS setup, static files may be accessed by varying the case of the filename in the request.\nIf only lower-case (common default) filters are present in Shiro, they may be bypassed this way.\n\nShiro 2.1.0 and later has a new parameters to remediate this issue\nshiro.ini: filterChainResolver.caseInsensitive = true\napplication.properties: shiro.caseInsensitive=true\n\nShiro 3.0.0 and later makes this the default in shiro.ini-based configurations.\nShiro 3.0.1 and later makes this the default in all configurations, including programmatic and Spring / Spring Boot.","epss":{"date":"2026-11-09","percentile":0.34227,"score":0.00397},"exploits":[],"kev":null,"metrics":[{"score":5.3,"severity":"medium","source":"ADP: CISA-ADP","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","version":"3.1"}],"modifiedAt":1794304230969,"publishedAt":1770629181772,"references":[{"source":"CNA: apache","tags":["vendor-advisory"],"url":"https://lists.apache.org/thread/5jjf0hnjcol58z2m5y255c7scz1lnp8k"},{"source":"ADP: CVE","tags":[],"url":"http://www.openwall.com/lists/oss-security/2026/02/08/1"}],"remediation":[],"revision":"977eb9d2b52bb0472d9a6ca8f2689a7fc7881b31a6580d53237bf45ffcb05a2f","sources":[{"modifiedAt":1794304230969,"name":"CNA: apache","retrievedAt":1794305302344,"url":"https://www.cve.org/CVERecord?id=CVE-2026-23903"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794305302829,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-23903"}],"ssvc":{"assessedAt":1770653840608,"automatable":"yes","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"Apache Shiro: Auth bypass when accessing static files only on case-insensitive filesystems","updatedAt":1794305302829}