{"schemaVersion":3,"id":"CVE-2026-15573","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"A flaw was found in Keycloak's Authorization Services. The component responsible for matching request paths to security policies (PathMatcher) does not properly normalize URIs before comparison. By adding extra characters like a trailing slash or matrix parameters to a URL, an attacker can trick the system into applying a less restrictive security policy than intended. This allows an authenticated user to access administrative or restricted areas they should not have permission to see.","dates":{"published":"2026-08-05T13:50:03.530Z","modified":"2026-08-31T09:43:55.904Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":8.1,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":8.1,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":8.1,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00459,"percentile":0.38472,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0.14200000000000002,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.00317},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00317,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00317,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00317,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00317,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00317,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00317,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00317,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00317,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00317,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00317,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00459,"percentile":0.38472}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.00317,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00317,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00317,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00317,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00459,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00459,"percentile":0.38472}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-551","name":"Incorrect Behavior Order: Authorization Before Parsing and Canonicalization","description":"If a web server does not fully parse requested URLs before it examines them for authorization, it may be possible for an attacker to bypass authorization protection.","type":"weakness","status":"Incomplete","abstraction":"Base","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/551.html"},{"id":"CWE-178","name":"Improper Handling of Case Sensitivity","description":"The product does not properly account for differences in case sensitivity when accessing or determining the properties of a resource, leading to inconsistent results.","type":"weakness","status":"Incomplete","abstraction":"Base","likelihoodOfExploit":null,"url":"https://cwe.mitre.org/data/definitions/178.html"}],"affected":[{"vendor":"redhat","product":"build_of_keycloak","name":"build of keycloak","label":"build_of_keycloak","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 26.4, < 26.4.14","noFixRecorded":false,"fixedIn":null},{"text":"≥ 26.6, < 26.6.5","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 26.4, < 26.4.14 | ≥ 26.6, < 26.6.5","eol":null,"hubHref":"/vendor/redhat/build_of_keycloak"},{"vendor":"redhat","product":"data_grid","name":"data grid","label":"data_grid","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"8.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"8.0","eol":null,"hubHref":"/vendor/redhat/data_grid"},{"vendor":"redhat","product":"jboss_enterprise_application_platform_expansion_pack","name":"jboss enterprise application platform expansion pack","label":"jboss_enterprise_application_platform_expansion_pack","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"na","noFixRecorded":false,"fixedIn":null}],"versionsText":"na","eol":null,"hubHref":"/vendor/redhat/jboss_enterprise_application_platform_expansion_pack"},{"vendor":"redhat","product":"single_sign-on","name":"single sign-on","label":"single_sign-on","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"7.0","noFixRecorded":false,"fixedIn":null}],"versionsText":"7.0","eol":null,"hubHref":"/vendor/redhat/single_sign-on"}],"affectedCount":4,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://access.redhat.com/errata/RHSA-2026:50846","label":"access.redhat.com/errata/RHSA-2026:50846","hostname":"access.redhat.com","tags":["Vendor Advisory","X Refsource REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:50847","label":"access.redhat.com/errata/RHSA-2026:50847","hostname":"access.redhat.com","tags":["Vendor Advisory","X Refsource REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:50848","label":"access.redhat.com/errata/RHSA-2026:50848","hostname":"access.redhat.com","tags":["Vendor Advisory","X Refsource REDHAT"]},{"url":"https://access.redhat.com/errata/RHSA-2026:50849","label":"access.redhat.com/errata/RHSA-2026:50849","hostname":"access.redhat.com","tags":["Vendor Advisory","X Refsource REDHAT"]},{"url":"https://access.redhat.com/security/cve/CVE-2026-15573","label":"access.redhat.com/security/cve/CVE-2026-15573","hostname":"access.redhat.com","tags":["VDB Entry","X Refsource REDHAT","Vendor Advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2499593","label":"bugzilla.redhat.com/show_bug.cgi?id=2499593","hostname":"bugzilla.redhat.com","tags":["Issue Tracking","X Refsource REDHAT","Vendor Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-08-05T13:50:03.530Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-08-31T09:43:55.904Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":32,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T14:42:29.711Z","stale":false,"partial":false}}