{"id":"CVE-2026-2603","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-2603","summary":"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…","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":"2026-03-18T02:16:24.813","modified":"2026-07-15T02:19:31.740","cvss":{"score":8.1,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:3925"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:3926"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:3947"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:3948"},{"type":"WEB","url":"https://access.redhat.com/security/cve/CVE-2026-2603"},{"type":"WEB","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2440300"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:3925"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:3926"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:3947"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:3948"},{"type":"WEB","url":"https://access.redhat.com/security/cve/CVE-2026-2603"},{"type":"WEB","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2440300"},{"type":"WEB","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2440300"},{"type":"WEB","url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-2603.json"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-07-15T02:19:31.740"}}