{"action":"Upgrade org.keycloak:keycloak-services to 26.5.7 or later.","affected":[{"fixed":"26.5.7","introduced":"0"}],"component":"org.keycloak:keycloak-services","cve_ids":["CVE-2026-4636"],"ecosystem":"Maven","epss":0.00428,"exploited":false,"fixed_versions":["26.5.7"],"ghsa_id":"GHSA-f2hx-5fx3-hmcv","id":"tcs_01M5N8TRN03E72SV9V4VZP3RJ7","modified_at":"2026-09-10T03:50:44.127098993Z","published_at":"2026-04-02T15:31:39Z","references":["https://osv.dev/vulnerability/GHSA-f2hx-5fx3-hmcv","https://nvd.nist.gov/vuln/detail/CVE-2026-4636","https://github.com/keycloak/keycloak/issues/47717","https://github.com/keycloak/keycloak/commit/995832f8b74b02833d106c8788bb7a78634aa725","https://access.redhat.com/errata/RHSA-2026:6475","https://access.redhat.com/errata/RHSA-2026:6476","https://access.redhat.com/errata/RHSA-2026:6477","https://access.redhat.com/errata/RHSA-2026:6478","https://access.redhat.com/security/cve/CVE-2026-4636","https://bugzilla.redhat.com/show_bug.cgi?id=2450251","https://github.com/keycloak/keycloak"],"severity":{"label":"high","score":8.1},"sources":[{"source":"osv","source_id":"GHSA-f2hx-5fx3-hmcv","url":"https://osv.dev/vulnerability/GHSA-f2hx-5fx3-hmcv"}],"summary":"Keycloak: UMA Policy Resource Injection Allows Unauthorized Cross-User Permission Grants"}