Are pumpkin seeds, in any form or shape, permissible to eat on Passover or are they considered kitnyot?
Pumpkim seeds are considered kiyniyot (as ruled by Rav Shlomo Zalman Auerbach, and other poskim).
Nevertheless, if they have not come into contact with water, it is permitted to eat them on Pesach (this depends on the way in which they are prepared).
There is a problem with some types of seeds in that they are stored with flour, and one must be wary of this.
Shulchan Aruch Harav (453:5) writes that kitniyos cannot be more stringent than wheat itself, which is permitted unless it comes into contact with water. This is also ruled by Chayei Adam 127:1, Maharsham 1:183, Be’er Yitzchak 11, Marcheshes 3, and others, and although Shaul U’Meishiv 1:1:175 and Maamar Mordechai 32 are stringent, one may follow the majority and be leninet on this matter. One must, however, be wary of flour that is sometimes used with the seeds.