gh-150726: validate wsgiref Headers control characters under -O#150727
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metsw24-max wants to merge 1 commit into
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gh-150726: validate wsgiref Headers control characters under -O#150727metsw24-max wants to merge 1 commit into
metsw24-max wants to merge 1 commit into
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Headers.__init__rejects control characters in header names and values only inside anif __debug__:block, so the check is dropped under-O/-OO.BaseHandler.start_responsebuilds its headers through this constructor, so a CR/LF value reflected from a request passes straight to the response there, splitting it. The other mutators (__setitem__,add_header,setdefault) already validate unconditionally; this makes__init__match.Closes #150726