{"id":"CVE-2026-18967","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-18967","summary":"A flaw was found in the SAML broker component of Keycloak, an identity and access management solution. When configured as a SAML broker using the IdP-Initiated flow, Keycloak fails…","details":"A flaw was found in the SAML broker component of Keycloak, an identity and access management solution. When configured as a SAML broker using the IdP-Initiated flow, Keycloak fails to enforce the OneTimeUse condition in SAML assertions. This allows an attacker who captures a valid, unused assertion to replay it multiple times. Successful exploitation could allow an attacker to hijack a user's session and gain unauthorized access to the system as that user.","published":"2026-08-06T07:16:29.413","modified":"2026-08-10T19:15:58.587","cvss":{"score":6.4,"severity":"MEDIUM","vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[],"fix":null,"references":[{"type":"ADVISORY","url":"https://access.redhat.com/security/cve/CVE-2026-18967"},{"type":"WEB","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2511604"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-08-10T19:15:58.587"}}