{"id":"CVE-2026-37982","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-37982","summary":"Keycloak: Unauthorized account takeover via WebAuthn token replay","details":"A flaw was found in Keycloak. This authentication vulnerability allows a remote attacker to replay `ExecuteActionsActionToken` tokens within Keycloak's WebAuthn (Web Authentication) flow. By intercepting an execute-actions email link, an attacker can register their own authenticator to a victim's account. This leads to unauthorized enrollment of a hardware-backed credential, enabling persistent account takeover.","published":"2026-05-19T12:31:40Z","modified":"2026-06-04T15:45:17.790282972Z","cvss":{"score":6.8,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N"},"epss":{"score":0.0044,"percentile":0.36626,"asOf":"2026-08-15"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.keycloak:keycloak-services","fixedVersion":"26.6.2"}],"fix":{"url":"https://github.com/keycloak/keycloak/pull/49126","label":"keycloak/keycloak#49126"},"references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-37982"},{"type":"WEB","url":"https://github.com/keycloak/keycloak/pull/49126"},{"type":"WEB","url":"https://github.com/keycloak/keycloak/commit/2d1a24f501454a44c52daa62855419b31dc499c1"},{"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-2026-37982"},{"type":"WEB","url":"https://bugzilla.redhat.com/show_bug.cgi?id=2455329"},{"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":"2026-06-04T15:45:17.790282972Z"}}