{"cvss":8.2,"datePublished":"2026-06-25T09:16:46.103","dateUpdated":"2026-10-25T23:10:00.167","description":"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 https://www.cve.org/CVERecord , 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.","id":"CVE-2026-56091","raw":{"affected":[{"affectedData":[{"collectionURL":"https://repo.maven.apache.org/maven2","defaultStatus":"unaffected","packageName":"org.apache.shiro:shiro-guice","product":"Apache Shiro","vendor":"Apache Software Foundation","versions":[{"lessThanOrEqual":"2.99.99","status":"affected","version":"0","versionType":"semver"},{"lessThanOrEqual":"3.0.0-alpha-1","status":"affected","version":"3.0.0-alpha-0","versionType":"semver"}]}],"source":"security@apache.org"}],"cveTags":[],"descriptions":[{"lang":"en","value":"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 https://www.cve.org/CVERecord , 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."},{"lang":"es","value":"Cuando se usa Apache Shiro con el módulo shiro-guice en un contexto de servlet web, una solicitud HTTP especialmente diseñada puede causar una omisión de autenticación.\nEsta vulnerabilidad es similar a https://www.cve.org/CVERecord?id=CVE-2020-1957 https://www.cve.org/CVERecord, excepto que afecta al módulo ’shiro-guice’ en lugar del módulo ’shiro-spring’.\n\nEste problema afecta a todas las versiones de Apache Shiro hasta la 2.x, y a la 3.0.0-alpha-1 solo cuando se usa el módulo ’shiro-guice’ en un contexto de servlet web.\n\nActualice a la versión 3.0.0 o posterior, que corrige el problema."}],"id":"CVE-2026-56091","lastModified":"2026-10-25T23:10:00.167","metrics":{"cvssMetricV40":[{"cvssData":{"Automatable":"YES","Recovery":"NOT_DEFINED","Safety":"PRESENT","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","availabilityRequirement":"NOT_DEFINED","baseScore":8.2,"baseSeverity":"HIGH","confidentialityRequirement":"NOT_DEFINED","exploitMaturity":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","privilegesRequired":"NONE","providerUrgency":"AMBER","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"NONE","valueDensity":"DIFFUSE","vectorString":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:P/AU:Y/R:X/V:D/RE:L/U:Amber","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE","vulnerabilityResponseEffort":"LOW"},"source":"security@apache.org","type":"Secondary"}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"id":"CVE-2026-56091","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","timestamp":"2026-06-25T12:10:08.791843Z","version":"2.0.3"}}]},"published":"2026-06-25T09:16:46.103","references":[{"source":"security@apache.org","url":"https://lists.apache.org/thread/onmtxmy2qonbpx7xlw3o34x8sctv47r7"}],"sourceIdentifier":"security@apache.org","vulnStatus":"Deferred","weaknesses":[{"description":[{"lang":"en","value":"CWE-289"}],"source":"security@apache.org","type":"Secondary"}]},"severity":"HIGH","source":"nvd","title":"When using Apache Shiro with the shiro-guice module in a web servlet context, a specially crafted HTTP request may ca..."}