{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-43827","assignerOrgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","state":"PUBLISHED","assignerShortName":"apache","dateReserved":"2026-05-02T22:26:19.626Z","datePublished":"2026-05-25T20:19:03.428Z","dateUpdated":"2026-05-26T12:39:39.186Z"},"containers":{"cna":{"affected":[{"collectionURL":"https://repo.maven.apache.org/maven2","defaultStatus":"unaffected","packageName":"org.apache.shiro:shiro-core","product":"Apache Shiro","vendor":"Apache Software Foundation","versions":[{"lessThanOrEqual":"2.1.0","status":"affected","version":"1.0","versionType":"semver"},{"lessThanOrEqual":"3.0.0-alpha-1","status":"affected","version":"3.0.0-alpha-0","versionType":"semver"}]}],"credits":[{"lang":"en","type":"finder","value":"Rasmus Moorats <xx@nns.ee>"},{"lang":"en","type":"remediation developer","value":"Lenny Primak <lenny@flowlogix.com>"}],"descriptions":[{"lang":"en","supportingMedia":[{"base64":false,"type":"text/html","value":"<p><span style=\"background-color: rgb(255, 255, 255);\">Default configurations of Apache Shiro have a s</span>ession fixation vulnerability.</p><p>This issue affects Apache Shiro from 1.0 to 2.1.0, and 3.0.0-alpha-1.</p><p>Users are recommended to upgrade to version 2.1.1, or 3.0.0-alpha-2 or later, which fixes the issue.</p>In the affected versions, when a session already exists, it is not invalidated upon successful login, nor is a new session being generated with a new ID.<br><br>"}],"value":"Default configurations of Apache Shiro have a session fixation vulnerability.\n\nThis issue affects Apache Shiro from 1.0 to 2.1.0, and 3.0.0-alpha-1.\n\nUsers are recommended to upgrade to version 2.1.1, or 3.0.0-alpha-2 or later, which fixes the issue.\n\nIn the affected versions, when a session already exists, it is not invalidated upon successful login, nor is a new session being generated with a new ID."}],"metrics":[{"cvssV4_0":{"Automatable":"YES","Recovery":"USER","Safety":"NOT_DEFINED","attackComplexity":"LOW","attackRequirements":"PRESENT","attackVector":"NETWORK","baseScore":5.9,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","providerUrgency":"AMBER","subAvailabilityImpact":"NONE","subConfidentialityImpact":"LOW","subIntegrityImpact":"NONE","userInteraction":"ACTIVE","valueDensity":"NOT_DEFINED","vectorString":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N/AU:Y/R:U/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-384","description":"CWE-384 Session Fixation","lang":"en","type":"CWE"}]}],"providerMetadata":{"orgId":"f0158376-9dc2-43b6-827c-5f631a4d8d09","shortName":"apache","dateUpdated":"2026-05-25T20:19:03.428Z"},"references":[{"tags":["vendor-advisory"],"url":"https://shiro.apache.org/security-reports.html#cve_2026_43827"}],"source":{"discovery":"EXTERNAL"},"title":"Apache Shiro: Session fixation: new session is not created after login by default","x_generator":{"engine":"Vulnogram 0.2.0"}},"adp":[{"title":"CVE Program Container","references":[{"url":"http://www.openwall.com/lists/oss-security/2026/05/25/6"}],"providerMetadata":{"orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE","dateUpdated":"2026-05-25T21:26:12.053Z"}},{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-05-26T12:39:33.503346Z","id":"CVE-2026-43827","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-05-26T12:39:39.186Z"}}]}}