Possible bad regex for email validator

[reames@…]

Around line 150 of /django/core/validators.py is a line in which I think there's a missing backslash:

r'|^"([\001-\010\013\014\016-\037!#-\[\]-\177]|\\[\001-011\013\014\016-\177])*"' # quoted-string
                                missing backslash? ----^

If you look at the debug output of that part of the regex, I think the backslash is what is meant.

>>> re.compile(r'[\001-\011]', re.DEBUG)
in
  range (1, 9)
<_sre.SRE_Pattern object at 0x137e9b0>
>>> re.compile(r'[\001-011]', re.DEBUG)
in
  range (1, 48)
  literal 49
  literal 49
<_sre.SRE_Pattern object at 0x137ea48>

Given this, the following email should fail: "\12"@example.com

A test case:
assert(email_re.match('"\\\12"@example.com') == None)

[Claude Paroz]

Fix missing backslash and tests

[Claude Paroz]

I think the fix should also be backported to stable branch.

[Aymeric Augustin]

In [17349]:

Fixed #17100 -- Typo in the regex for EmailValidator. Thanks reames AT asymmetricventures com for the report and Claude Paroz for the patch.

[Aymeric Augustin]

In [17350]:

(The changeset message doesn't reference this ticket)