CVE-2026-37982 — Keycloak: org.keycloak.authentication: keycloak: unauthorized account takeover via webauthn token replay
A flaw was found in Keycloak. This authentication vulnerability allows a remote attacker to replay `ExecuteActionsActionToken` tokens within Keycloak's WebAuthn (Web Authenticat…
Published: 2026-05-19 · CVSS: 6.8 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7