{"id":"CVE-2026-56091","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-56091","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.","published":"2026-06-25T09:31:23Z","modified":"2026-11-03T21:31:24.748589787Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.apache.shiro:shiro-guice","fixedVersion":"3.0.0"}],"fix":{"url":"https://github.com/github/advisory-database/pull/10078","label":"github/advisory-database#10078"},"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"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-11-03T21:31:24.748589787Z"}}