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It's NOP in x86 asm and the guy's handle. https://twitter.com/_x90__

Or what is the second line to you?

Thanks.

You mean: # ~ \x90

What leads you to believe that's a stack smashing attempt?

I really hope you get an answer. I don't care that it's wrong, I want to hear why.

"I once saw '0x90' in an exploit. I see it in this file. This file must be an exploit."

And that's enough to get someone that almost never comments to post an alert? I hope it's at least a little more interesting than that.

can you elaborate? is it exploiting a vulnerability in cpython? if so, what is it?

I do not believe this is exploiting a vulnerability in cpython.