{"id":"BIT-keycloak-2026-16442","summary":"Keycloak-services: keycloak-services: saml idp-initiated broker login bypasses link-only restriction","details":"A flaw was found in the SAML broker component of Keycloak, which is used to manage identity federation and user authentication. The issue occurs because the IdP-initiated Single Sign-On endpoint fails to check if a provider is restricted to account linking only. This allows an attacker with control over a linked upstream identity to bypass login restrictions and gain full access to a local user account.","aliases":["CVE-2026-16442"],"modified":"2026-09-08T08:48:06.523707141Z","published":"2026-08-25T11:41:52.283Z","database_specific":{"cpes":["cpe:2.3:a:redhat:build_of_keycloak:*:*:*:*:*:*:*:*","cpe:2.3:a:keycloak:keycloak:*:*:*:*:*:*:*:*"],"severity":"Critical"},"references":[{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:50846"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:50847"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:50848"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:50849"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-16442"},{"type":"ADVISORY","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2503138"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-16442"}],"affected":[{"package":{"name":"keycloak","ecosystem":"Bitnami","purl":"pkg:bitnami/keycloak"},"ranges":[{"type":"SEMVER","events":[{"introduced":"26.4.0"},{"fixed":"26.4.14"},{"introduced":"26.6.0"},{"fixed":"26.6.5"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/keycloak/BIT-keycloak-2026-16442.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}],"schema_version":"1.9.0"}