My original tumblr post was here. This is the December 1950 cover of Out of this World Adventures, a pulp magazine that was edited by Donald A. Wolheim and appears to have only had two issues; the ISFDB entry for the magazine is here. I found the cover tweeted by Victor M. Luoma. I’ve been unable to ascertain the identity of the artist, but I did find a larger version of the same image at Retrospace.
So, was she stabbed by the space spider? And why does the lady in red not need a space helmet? So many questions, so few navels.