{"id":"CVE-2026-1609","aliases":["BIT-keycloak-2026-1609","EUVD-2026-44841","GHSA-5xcf-8m2w-ph6f"],"status":"published","title":"Org.keycloak/keycloak-quarkus-server: keycloak: unauthorized access via jwt authorization grant with disabled users","description":"A flaw was found in Keycloak. When the JSON Web Token (JWT) authorization grant preview feature is enabled and a user account is disabled, Keycloak fails to validate the user’s disabled status during JWT authorization grant processing. A remote attacker with low privileges can exploit this improper access control vulnerability by presenting a valid assertion token from an external identity provider to obtain a JWT for a disabled user. This allows unauthorized access to sensitive resources.","severity":{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-09","score":0.00562,"percentile":0.47001,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-284"],"published":"2026-07-16T00:26:10Z","modified":"2026-11-04T02:47:31Z","fixes":[{"ecosystem":"Bitnami","package":"keycloak","fixed_in":["26.5.3"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"keycloak","ranges":[{"type":"SEMVER","events":[{"introduced":"26.5.2"},{"fixed":"26.5.3"}]}]}],"products":[{"vendor":"keycloak","product":"keycloak"},{"vendor":"red hat","product":"red hat jboss enterprise application platform 8"},{"vendor":"red hat","product":"red hat jboss enterprise application platform expansion pack"},{"vendor":"redhat","product":"build_of_keycloak"}],"references":[{"url":"https://access.redhat.com/security/cve/CVE-2026-1609","tags":["vdb-entry","x_refsource_REDHAT","Vendor Advisory","advisory"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2435257","tags":["issue-tracking","x_refsource_REDHAT","Issue Tracking","Vendor Advisory","advisory","report"]},{"url":"https://github.com/keycloak/keycloak/issues/46144","tags":["Issue Tracking","report"]},{"url":"https://github.com/keycloak/keycloak/releases/tag/26.5.3","tags":["Release Notes","article","web"]},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-1609.json","tags":["x_sadp-csaf-vex","Vendor Advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-1609","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-5xcf-8m2w-ph6f"},{"url":"https://access.redhat.com/jbossnetwork/restricted/listSoftware.html","tags":["web"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/1xxx/CVE-2026-1609.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-1609","title":"Org.keycloak/keycloak-quarkus-server: keycloak: unauthorized access via jwt authorization grant with disabled users","description":"A flaw was found in Keycloak. When the JSON Web Token (JWT) authorization grant preview feature is enabled and a user account is disabled, Keycloak fails to validate the user’s disabled status during JWT authorization grant processing. A remote attacker with low privileges can exploit this improper access control vulnerability by presenting a valid assertion token from an external identity provider to obtain a JWT for a disabled user. This allows unauthorized access to sensitive resources.","status":"published","published":"2026-07-16T00:26:10.772Z","modified":"2026-08-10T12:05:51.935Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"high","assessor":"cna"},{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"high","assessor":"adp"}],"cwes":["CWE-284","CWE-284"],"updated_at":"2026-11-02T14:20:00.879257Z"}],"euvd":[{"id":"EUVD-2026-44841","description":"A flaw was found in Keycloak. When the JSON Web Token (JWT) authorization grant preview feature is enabled and a user account is disabled, Keycloak fails to validate the user’s disabled status during JWT authorization grant processing. A remote attacker with low privileges can exploit this improper access control vulnerability by presenting a valid assertion token from an external identity provider to obtain a JWT for a disabled user. This allows unauthorized access to sensitive resources.","status":"published","published":"2026-07-16T00:26:10Z","modified":"2026-08-10T12:05:51Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"high"}],"updated_at":"2026-11-02T18:02:05.732685Z"}],"ghsa":[{"id":"GHSA-5xcf-8m2w-ph6f","title":"A flaw was found in Keycloak. When the JSON Web Token (JWT) authorization grant preview feature...","description":"A flaw was found in Keycloak. When the JSON Web Token (JWT) authorization grant preview feature is enabled and a user account is disabled, Keycloak fails to validate the user’s disabled status during JWT authorization grant processing. A remote attacker with low privileges can exploit this improper access control vulnerability by presenting a valid assertion token from an external identity provider to obtain a JWT for a disabled user. This allows unauthorized access to sensitive resources.","status":"published","published":"2026-07-16T03:32:44Z","modified":"2026-07-16T12:32:28Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"high"}],"cwes":["CWE-284"],"updated_at":"2026-11-02T15:09:33.90316Z"}],"nvd":[{"id":"CVE-2026-1609","description":"A flaw was found in Keycloak. When the JSON Web Token (JWT) authorization grant preview feature is enabled and a user account is disabled, Keycloak fails to validate the user’s disabled status during JWT authorization grant processing. A remote attacker with low privileges can exploit this improper access control vulnerability by presenting a valid assertion token from an external identity provider to obtain a JWT for a disabled user. This allows unauthorized access to sensitive resources.","status":"published","published":"2026-07-16T01:16:30.38Z","modified":"2026-08-09T15:10:59.85Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"high","assessor":"secondary"},{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"high","assessor":"primary"},{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"high","assessor":"secondary"}],"cwes":["CWE-284"],"updated_at":"2026-11-02T14:12:30.250437Z"}],"osv":[{"id":"CVE-2026-1609","title":"Org.keycloak/keycloak-quarkus-server: keycloak: unauthorized access via jwt authorization grant with disabled users","description":"A flaw was found in Keycloak. When the JSON Web Token (JWT) authorization grant preview feature is enabled and a user account is disabled, Keycloak fails to validate the user’s disabled status during JWT authorization grant processing. A remote attacker with low privileges can exploit this improper access control vulnerability by presenting a valid assertion token from an external identity provider to obtain a JWT for a disabled user. This allows unauthorized access to sensitive resources.","status":"published","published":"2026-07-16T00:26:10.772Z","modified":"2026-11-06T10:46:30.957935067Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N","level":"high"}],"cwes":["CWE-284"],"updated_at":"2026-11-06T11:08:55.873774Z"},{"id":"BIT-keycloak-2026-1609","title":"Org.keycloak/keycloak-quarkus-server: keycloak: unauthorized access via jwt authorization grant with disabled users","description":"A flaw was found in Keycloak. When the JSON Web Token (JWT) authorization grant preview feature is enabled and a user account is disabled, Keycloak fails to validate the user’s disabled status during JWT authorization grant processing. A remote attacker with low privileges can exploit this improper access control vulnerability by presenting a valid assertion token from an external identity provider to obtain a JWT for a disabled user. This allows unauthorized access to sensitive resources.","status":"published","published":"2026-08-25T11:41:44.613Z","modified":"2026-09-08T08:48:06.699150632Z","updated_at":"2026-11-02T15:28:32.162822Z"}]}}