Their performance in these two games could also affect their seeding for next month's qualifying draw for the Euro 2028 tournament.
Coach Jan Urban's side have two games left in Group B4: against Romania in Bucharest on Saturday and Sweden in Wrocław three days later.
Poland are third in the group with four points, behind leaders Sweden on 10 and Bosnia and Herzegovina on eight. Romania have yet to earn a point.
"We are in this position primarily because of our matches against Bosnia," Urban said, referring to a 0-0 home draw and a 0-1 away defeat.
He added: "We did not expect to take so few points from that opponent. We would be in a completely different position in the group today, with a real chance; I don't know about first place, but certainly second. We regret that because we should have more points."
Poland can no longer finish first and earn automatic promotion to League A. That place will go to either Sweden or Bosnia and Herzegovina.
The Poles can still finish second and reach a promotion playoff, but they would need favourable results in the final two rounds.
Remaining third appears the most likely outcome, while Romania are in danger of finishing last.
(gs)
Source: IAR/PAP