RIO DE JANEIRO, Sept. 26 (Xinhua) -- Brazil's far-right presidential candidate Jair Bolsonaro continues to have the lead over his rivals and the gap between him and the runner-up remains stable, the latest poll showed.

The poll was commissioned by the National Transports Confederation (CNI) and published by consulting company Ibope on Wednesday, less than two weeks before the Oct. 7 elections.

Bolsonaro from the Social Liberal Party (PSL) has 27 percent of voting intentions, against the 21 percent of Fernando Haddad, from the Workers' Party (PT). Both candidates have one more percentage point than they had in the previous poll, meaning that the difference between them remains stable at six points, according to the CNI/Ibope poll.

The Democratic Labor Party's (PDT) Ciro Gomes comes third, with 12 percent, up from 11 percent in the previous poll. Geraldo Alckmin from the Brazilian Social Democracy Party (PSDB) remains stable at 8 percent, followed by Sustainability Network's (REDE) Marina Silva, with 6 percent, up from 5 percent in the previous poll.

Eleven percent of interviewees said they will vote null, from 12 percent in the previous poll. Undecided electors rose from 6 to 7 percent.

The CNI/Ibope poll also measured the rejection rate for the presidential candidates.

Bolsonaro, with his controversial stances on human rights, gun control, crime, women's rights and rights of minorities, has the absolute lead on the rejection rate -- 44 percent.

Haddad and Silva are tied, with 27 percent of rejection, and Alckmin places third, with 19 percent, and Gomes fourth with 16 percent of rejection.

Bolsonaro's high rejection rate is likely to bring him trouble in a runoff. Out of four simulations, Bolsonaro loses in three. In a possible runoff against Haddad, the poll indicated Haddad's victory with 42 against 38 percent.

The poll was carried out from Saturday to Monday, with 2,000 voters from 126 towns all over Brazil. The margin of error is two points.