{"id":"CVE-2026-7307","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-7307","summary":"Keycloak: Denial of Service via specially crafted SAML input","details":"A flaw was found in Keycloak. A remote, unauthenticated attacker can send a specially crafted XML input to the Security Assertion Markup Language (SAML) endpoint. This malicious input can cause high CPU usage and worker thread starvation, leading to a Denial of Service (DoS) where the server becomes unavailable.","published":"2026-05-19T12:31:41Z","modified":"2026-06-04T15:45:17.821096997Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":{"score":0.00743,"percentile":0.51681,"asOf":"2026-08-15"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.keycloak:keycloak-saml-core","fixedVersion":"26.6.2"}],"fix":{"url":"https://github.com/keycloak/keycloak/pull/49119","label":"keycloak/keycloak#49119"},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-7307"},{"type":"WEB","url":"https://github.com/keycloak/keycloak/pull/49119"},{"type":"WEB","url":"https://github.com/keycloak/keycloak/commit/be84d28ce4c69c038d542f11405d5ede1d61f4a9"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:19594"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:19595"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:19596"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:19597"},{"type":"WEB","url":"https://access.redhat.com/security/cve/CVE-2026-7307"},{"type":"WEB","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2476526"},{"type":"PACKAGE","url":"https://github.com/keycloak/keycloak"},{"type":"WEB","url":"https://github.com/keycloak/keycloak/releases/tag/26.6.2"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-06-04T15:45:17.821096997Z"}}