Description

t-8ch

opened on Jan 9, 2023

Issue body actions

Bug report

When during address list folding a separating comma ends up on a folded line containing that is to be unicode-encoded than the separator itself is also unicode encoded. Instead the comma should still a plain comma.

This is rejected by some mail servers:

ZZZ: host YYY said:
    550 Invalid address in message header. Consult RFC2822. (in reply to end of
    DATA command)

Minimal example:

>>> import email
>>> m = email.message.EmailMessage()
>>> t = '01234567890123456789012345678901234567890123456789012345678901@example.org, ä <[email protected]>'
>>> m['to'] = t
>>> m.as_string()
'to: 01234567890123456789012345678901234567890123456789012345678901@example.org\n =?utf-8?q?=2C?= =?utf-8?q?=C3=A4?= <[email protected]>\n\n'

Your environment

• CPython versions tested on: 3.10.9, latest main (e47b139)
• Operating system and architecture: ArchLinux x86_64

Linked PRs

• GH-100884: email/_header_value_parser: don't encode list separators #100885
• [3.12] gh-100884: email/_header_value_parser: don't encode list separators (GH-100885) #115592
• [3.11] gh-100884: email/_header_value_parser: don't encode list separators (GH-100885) #115593

Activity

1. t-8ch

   added

   type-bugAn unexpected behavior, bug, or errorAn unexpected behavior, bug, or error

   on Jan 9, 2023
2. t-8ch

   added 3 commits that reference this issue on Jan 9, 2023

   pythonGH-100884: email/_header_value_parser: use existing ListSeparator

   b1f41b8

   pythonGH-100884: email/_header_value_parser: don't encode list separa…

   98ab61d

   pythonGH-100884: email/_header_value_parser: don't encode list separa…

   75a89ca
3. mdboom

   added

   topic-email

   on Jan 9, 2023
4. mricon

   added a commit that references this issue on Jan 9, 2023

   tests: add another test for very long email address

   26e7d3c
5. serhiy-storchaka

   closed this as completedin #100885on Feb 17, 2024
6. serhiy-storchaka

   added a commit that references this issue on Feb 17, 2024

   gh-100884: email/_header_value_parser: don't encode list separators (G…

   09fab93
7. miss-islington

   added 2 commits that reference this issue on Feb 17, 2024

   pythongh-100884: email/_header_value_parser: don't encode list separa…

   5f617f2

   pythongh-100884: email/_header_value_parser: don't encode list separa…

   a2640a5
8. serhiy-storchaka

   added 2 commits that reference this issue on Feb 17, 2024

   [3.12] gh-100884: email/_header_value_parser: don't encode list separ…

   9148b77

   [3.11] gh-100884: email/_header_value_parser: don't encode list separ…

   70754d2
9. woodruffw

   added a commit that references this issue on Mar 4, 2024

   pythongh-100884: email/_header_value_parser: don't encode list separa…

   90daba0
10. diegorusso

    added a commit that references this issue on Apr 17, 2024

    pythongh-100884: email/_header_value_parser: don't encode list separa…

    8b88128
11. serhiy-storchaka

    added 3 commits that reference this issue on May 16, 2024

    pythongh-118643: Fix AttributeError in the email module

    af3ced0

    pythongh-118643: Fix AttributeError in the email module

    ad85b83

    gh-118643: Fix AttributeError in the email module (GH-119099)

    858b9e8
12. miss-islington

    added 2 commits that reference this issue on May 22, 2024

    pythongh-118643: Fix AttributeError in the email module (pythonGH-119099

    6d4b54f

    pythongh-118643: Fix AttributeError in the email module (pythonGH-119099

    d111cba
13. serhiy-storchaka

    added 3 commits that reference this issue on May 22, 2024

    [3.11] pythongh-118643: Fix AttributeError in the email module (pytho…

    9bfb6ae

    [3.13] gh-118643: Fix AttributeError in the email module (GH-119099) (G…

    6892b40

    [3.12] gh-118643: Fix AttributeError in the email module (GH-119099) (G…

    8c96850
14. pablogsal

    added a commit that references this issue on May 23, 2024

    [3.11] gh-118643: Fix AttributeError in the email module (GH-119099) (#…

    4762b36
15. estyxx

    added a commit that references this issue on Jul 17, 2024

    pythongh-118643: Fix AttributeError in the email module (pythonGH-119099

    c068bee
16. LukasWoodtli

    added a commit that references this issue on Jan 22, 2025

    pythongh-100884: email/_header_value_parser: don't encode list separa…

    f306be6
17. mcepl commented on Mar 11, 2025

    

    mcepl

    on Mar 11, 2025

    Contributor

    More actions

    Shouldn’t CVE-2025-1795 be mentioned here?

    Reacted by Anthony Green

Issue actions