{"id":"CVE-2026-2603","aliases":["GHSA-x4p7-7chp-64hq"],"url":"https://o3.security/vulnerability/CVE-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.","published":"2026-08-25T11:42:12.806Z","modified":"2026-09-08T08:48:06.531511111Z","cvss":null,"epss":{"score":0.00425,"percentile":0.3622,"asOf":"2026-09-17"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Bitnami","name":"keycloak","fixedVersion":"26.2.14"}],"fix":null,"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"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-09-08T08:48:06.531511111Z"}}