Yup. Although if you do want to get political, I'd say this falls under the definition of cyber warfare. Also the maintainer didn't only "allow" it, it seems he is the author of the malicious module as well.
Whats painful is that in terms of cyberwarfare, allied systems maintain dominance of global grid with innovation and open source. If we had allies in russia, im sure we have fewer now. This sort of DOS attack is effective in first order effects but the second order effects could be increased resentment and new systems developed in isolation.