{"id":"CVE-2026-1529","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-1529","summary":"Keycloak affected by improper invitation token validation","details":"A flaw was found in Keycloak. An attacker can exploit this vulnerability by modifying the organization ID and target email within a legitimate invitation token's JSON Web Token (JWT) payload. This lack of cryptographic signature verification allows the attacker to successfully self-register into an unauthorized organization, leading to unauthorized access.","published":"2026-02-09T21:31:03Z","modified":"2026-02-13T20:56:19.441578Z","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":[{"ecosystem":"Maven","name":"org.keycloak:keycloak-services","fixedVersion":"26.5.3"},{"ecosystem":"Maven","name":"org.keycloak:keycloak-services","fixedVersion":"26.2.13"},{"ecosystem":"Maven","name":"org.keycloak:keycloak-services","fixedVersion":"26.4.9"}],"fix":{"url":"https://github.com/keycloak/keycloak/pull/46155","label":"keycloak/keycloak#46155"},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-1529"},{"type":"WEB","url":"https://github.com/keycloak/keycloak/issues/46145"},{"type":"WEB","url":"https://github.com/keycloak/keycloak/pull/46155"},{"type":"WEB","url":"https://github.com/keycloak/keycloak/commit/82cd7941d1dd28fa14a67a6e6b912301f1a5e1a1"},{"type":"WEB","url":"https://github.com/keycloak/keycloak/commit/8fc9a98026106a326f4faa98d4c9a48341ace2d7"},{"type":"WEB","url":"https://github.com/keycloak/keycloak/commit/b2519756487b519f95c07aa8b10afe003e492119"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:2363"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:2364"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:2365"},{"type":"WEB","url":"https://access.redhat.com/errata/RHSA-2026:2366"},{"type":"WEB","url":"https://access.redhat.com/security/cve/CVE-2026-1529"},{"type":"WEB","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2433783"},{"type":"PACKAGE","url":"https://github.com/keycloak/keycloak"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-02-13T20:56:19.441578Z"}}