{"id":"BIT-keycloak-2026-2603","summary":"Keycloak: keycloak: unauthorized authentication via disabled saml identity provider","details":"A flaw was found in Keycloak. A remote attacker could bypass security controls by sending a valid SAML response from an external Identity Provider (IdP) to the Keycloak SAML endpoint for IdP-initiated broker logins. This allows the attacker to complete broker logins even when the SAML Identity Provider is disabled, leading to unauthorized authentication.","aliases":["CVE-2026-2603","GHSA-x4p7-7chp-64hq"],"modified":"2026-09-08T08:48:06.531511111Z","published":"2026-08-25T11:42:12.806Z","database_specific":{"severity":"High","cpes":["cpe:2.3:a:redhat:build_of_keycloak:*:*:*:*:*:*:*:*","cpe:2.3:a:keycloak:keycloak:*:*:*:*:*:*:*:*"]},"references":[{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:3925"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:3926"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:3947"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2026:3948"},{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-2603"},{"type":"ADVISORY","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2440300"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-2603"},{"type":"ADVISORY","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2603.json"}],"affected":[{"package":{"name":"keycloak","ecosystem":"Bitnami","purl":"pkg:bitnami/keycloak"},"ranges":[{"type":"SEMVER","events":[{"introduced":"26.2.0"},{"fixed":"26.2.14"},{"introduced":"26.4.0"},{"fixed":"26.4.10"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/keycloak/BIT-keycloak-2026-2603.json"},"severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N"}]}],"schema_version":"1.9.0"}