{"id":"GHSA-qj64-jj84-w38j","summary":"Apache Shiro shiro-guice module vulnerable to authentication bypass","details":"When using Apache Shiro with the shiro-guice module in a web servlet context, a specially crafted HTTP request may cause an authentication bypass.\nThis vulnerability is similar to  https://www.cve.org/CVERecord?id=CVE-2020-1957, except that it affects the `shiro-guice` module instead of the `shiro-spring` module.\n\nThis issue affects all Apache Shiro versions through 2.x, and 3.0.0-alpha-1 only when using `shiro-guice` module in a web servlet context.\n\nUpgrade to version 3.0.0 or later, which fixes the issue.","aliases":["CVE-2026-56091"],"modified":"2026-11-03T21:31:24.748589787Z","published":"2026-06-25T09:31:23Z","database_specific":{"cwe_ids":["CWE-289"],"severity":"HIGH","github_reviewed":true,"github_reviewed_at":"2026-11-03T21:24:22Z","nvd_published_at":"2026-06-25T09:16:46Z"},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-56091"},{"type":"WEB","url":"https://github.com/github/advisory-database/pull/10078"},{"type":"WEB","url":"https://github.com/apache/shiro/commit/42aa34467ad30f085fc8e003042db0c397fe8d57"},{"type":"PACKAGE","url":"https://github.com/apache/shiro"},{"type":"WEB","url":"https://lists.apache.org/thread/onmtxmy2qonbpx7xlw3o34x8sctv47r7"}],"affected":[{"package":{"name":"org.apache.shiro:shiro-guice","ecosystem":"Maven","purl":"pkg:maven/org.apache.shiro/shiro-guice"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"2.0.0"},{"fixed":"3.0.0"}]}],"versions":["2.0.0","2.0.1","2.0.2","2.0.3","2.0.4","2.0.5","2.0.6","2.1.0","2.2.0","2.2.1","3.0.0-alpha-1"],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/06/GHSA-qj64-jj84-w38j/GHSA-qj64-jj84-w38j.json"}}],"schema_version":"1.9.2","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/S:P/AU:Y/V:D/RE:L/U:Amber"}]}