| Package | Affected versions | Patched versions |
|---|---|---|
| org.keycloak:keycloak-services | < 26.6.2 | 26.6.2 |
| build of keycloak | ≥ 26.4, < 26.4.12 | 26.4.12 |
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.
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