commit da3d2abe6be9fcf18cac12ec5d7d9f1180d94b5e
author Senthil Kumaran <senthil@uthcode.com> Sat Dec 05 05:26:24 2020 -0800
committer GitHub <noreply@github.com> Sat Dec 05 05:26:24 2020 -0800
tree 20e9e1dcf25c25fcfc998cae6f0b6f2049749edb
parent 556d97f473fa538cef780f84bd29239ecf57d9c5

GH-5054: CGIHTTPRequestHandler.run_cgi() HTTP_ACCEPT improperly parsed (#23638)

Lib/http/server.py

diff --git a/Lib/http/server.py b/Lib/http/server.py
index c611381..94f730e 100644
--- a/Lib/http/server.py
+++ b/Lib/http/server.py
@@ -1122,12 +1122,7 @@ def run_cgi(self):
         referer = self.headers.get('referer')
         if referer:
             env['HTTP_REFERER'] = referer
-        accept = []
-        for line in self.headers.getallmatchingheaders('accept'):
-            if line[:1] in "\t\n\r ":
-                accept.append(line.strip())
-            else:
-                accept = accept + line[7:].split(',')
+        accept = self.headers.get_all('accept', ())
         env['HTTP_ACCEPT'] = ','.join(accept)
         ua = self.headers.get('user-agent')
         if ua: