{"id":"CVE-2026-56091","state":"PUBLISHED","title":"Apache Shiro: Authentication bypass in Guice-Web integration","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.","publishedAt":"2026-06-25T08:45:19.426Z","updatedAt":"2026-06-25T12:10:34.365Z","severity":{"score":8.2,"label":"High","version":"4.0","vector":"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","source":"apache"},"assigner":"apache","products":["Apache Software Foundation Apache Shiro"],"affected":[{"vendor":"Apache Software Foundation","product":"Apache Shiro","packageName":"org.apache.shiro:shiro-guice","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"2.99.99","versionType":"semver"},{"version":"3.0.0-alpha-0","status":"affected","lessThanOrEqual":"3.0.0-alpha-1","versionType":"semver"}],"collectionURL":"https://repo.maven.apache.org/maven2"}],"references":["https://lists.apache.org/thread/onmtxmy2qonbpx7xlw3o34x8sctv47r7"],"weaknesses":["CWE-289"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/56xxx/CVE-2026-56091.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-56091","state":"PUBLISHED","datePublished":"2026-06-25T08:45:19.426Z","dateUpdated":"2026-06-25T12:10:34.365Z","assignerShortName":"apache","assignerOrgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","dateReserved":"2026-06-18T17:12:37.896Z"},"containers":{"cna":{"title":"Apache Shiro: Authentication bypass in Guice-Web integration","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."}],"affected":[{"vendor":"Apache Software Foundation","product":"Apache Shiro","packageName":"org.apache.shiro:shiro-guice","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThanOrEqual":"2.99.99","versionType":"semver"},{"version":"3.0.0-alpha-0","status":"affected","lessThanOrEqual":"3.0.0-alpha-1","versionType":"semver"}],"collectionURL":"https://repo.maven.apache.org/maven2"}],"references":[{"url":"https://lists.apache.org/thread/onmtxmy2qonbpx7xlw3o34x8sctv47r7","tags":["vendor-advisory"]}],"metrics":[{"cvssV4_0":{"Automatable":"YES","Recovery":"NOT_DEFINED","Safety":"PRESENT","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":8.2,"baseSeverity":"HIGH","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/S:P/AU:Y/V:D/RE:L/U:Amber","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"HIGH","vulnIntegrityImpact":"NONE","vulnerabilityResponseEffort":"LOW"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-289","description":"CWE-289 Authentication Bypass by Alternate Name","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"apache","orgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","dateUpdated":"2026-06-25T08:45:19.426Z"},"credits":[{"lang":"en","type":"finder","value":"LocalHost <localhost.detect@gmail.com>"},{"lang":"en","type":"remediation developer","value":"Lenny Primak <lenny@flowlogix.com>"}],"source":{"discovery":"EXTERNAL"},"x_generator":{"engine":"Vulnogram 0.2.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-06-25T12:10:08.791843Z","id":"CVE-2026-56091","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-06-25T12:10:34.365Z"}}]}}}