src/main/java/org/keycloak/protocol/cas/endpoints/AbstractValidateEndpoint.java

@@ -151,7 +151,7 @@
            throw new CASValidationException(CASErrorCode.INVALID_TICKET, "Code is expired", Response.Status.BAD_REQUEST);
        }

        clientSession.setNote(prefix, ticket);
        clientSession.setNote(CASLoginProtocol.SESSION_TICKET, ticket);

        if (requireReauth && AuthenticationManager.isSSOAuthentication(clientSession)) {
            event.error(Errors.SESSION_EXPIRED);