[3.9] gh-80222: Fix email address header folding with long quoted-string (GH-122753) (GH-129111) by brianschubert · Pull Request #132371 · python/cpython · GitHub
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[3.9] gh-80222: Fix email address header folding with long quoted-string (GH-122753) (GH-129111) #132371

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ambv merged 1 commit into from
Jun 2, 2025
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[3.9] gh-80222: Fix email address header folding with long quoted-string (GH-122753) (GH-129111) #132371

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19 changes: 18 additions & 1 deletion Lib/email/_header_value_parser.py
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27 changes: 27 additions & 0 deletions Lib/test/test_email/test__header_value_parser.py
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Original file line number Diff line number Diff line change
Expand Up @@ -2946,6 +2946,33 @@ def test_address_list_with_unicode_names_in_quotes(self):
'=?utf-8?q?H=C3=BCbsch?= Kaktus <beautiful@example.com>,\n'
' =?utf-8?q?bei=C3=9Ft_bei=C3=9Ft?= <biter@example.com>\n')

def test_address_list_with_specials_in_long_quoted_string(self):
# Regression for gh-80222.
policy = self.policy.clone(max_line_length=40)
cases = [
# (to, folded)
('"Exfiltrator <spy@example.org> (unclosed comment?" <to@example.com>',
'"Exfiltrator <spy@example.org> (unclosed\n'
' comment?" <to@example.com>\n'),
('"Escaped \\" chars \\\\ in quoted-string stay escaped" <to@example.com>',
'"Escaped \\" chars \\\\ in quoted-string\n'
' stay escaped" <to@example.com>\n'),
('This long display name does not need quotes <to@example.com>',
'This long display name does not need\n'
' quotes <to@example.com>\n'),
('"Quotes are not required but are retained here" <to@example.com>',
'"Quotes are not required but are\n'
' retained here" <to@example.com>\n'),
('"A quoted-string, it can be a valid local-part"@example.com',
'"A quoted-string, it can be a valid\n'
' local-part"@example.com\n'),
('"local-part-with-specials@but-no-fws.cannot-fold"@example.com',
'"local-part-with-specials@but-no-fws.cannot-fold"@example.com\n'),
]
for (to, folded) in cases:
with self.subTest(to=to):
self._test(parser.get_address_list(to)[0], folded, policy=policy)

def test_address_list_with_specials_in_encoded_word(self):
# An encoded-word parsed from a structured header must remain
# encoded when it contains specials. Regression for gh-121284.
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6 changes: 6 additions & 0 deletions Misc/NEWS.d/next/Security/2024-08-06-11-43-08.gh-issue-80222.wfR4BU.rst
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