Issues

mailbox.Babyl returns labels as bytes after reading a mailbox file

python/cpython#160598 · opened

on Oct 24, 2026

Incorrectly formatted error message in `asyncio.proactor_events.sendto()`

python/cpython#160596 · opened

on Oct 24, 2026

csv.Sniffer.sniff() takes quadratic time on long runs of spaces

python/cpython#160556 · opened

on Oct 24, 2026

`xml.dom.minidom.parseString()` takes quadratic time on text delivered in many pieces

python/cpython#160525 · opened

on Oct 23, 2026

`os.path.realpath()` on Windows misresolves a broken symlink reached through a directory symlink

python/cpython#160506 · opened

on Oct 23, 2026

Colorful `pprint`

python/cpython#160466 · opened

on Oct 23, 2026

5

tarfile and zipfile write through an existing symlink or hard link when extracting a file

python/cpython#160446 · opened

on Oct 23, 2026

selectors: modify() of poll-based selectors accepts an invalid event mask

python/cpython#160431 · opened

on Oct 23, 2026

1

asyncio: Windows socket reset during Proactor cleanup skips socket closure and transport detachment

python/cpython#160429 · opened

on Oct 23, 2026

Sync with importlib_metadata for Python 3.16

python/cpython#160386 · opened

on Oct 22, 2026

asyncio socket transport sends modified data when a bytearray is changed after `write()`

python/cpython#160321 · opened

on Oct 22, 2026

1

`lzma` and `bz2` silently ignore a damaged later stream as trailing data

python/cpython#160314 · opened

on Oct 22, 2026

One-shot `decompress()` in `gzip`, `bz2`, `lzma` and `compression.zstd` is quadratic in the number of members

python/cpython#160310 · opened

on Oct 22, 2026

`codecs.StreamReader.read()` silently drops an incomplete character at the end of the stream

python/cpython#160309 · opened

on Oct 22, 2026

The punycode incremental encoder and decoder transform each chunk separately

python/cpython#160308 · opened

on Oct 22, 2026

`http.cookiejar` skips domain checks for cookies with a negative `Version`

python/cpython#160300 · opened

on Oct 22, 2026

`tarfile` applies a hard link member's attributes through a symlink extracted in its place

python/cpython#160297 · opened

on Oct 22, 2026

Activating a venv can execute shell commands from a directory name

python/cpython#160280 · opened

on Oct 22, 2026

Creating a venv can run a local ensurepip.py

python/cpython#160279 · opened

on Oct 22, 2026

2

ipaddress: 192.88.99.2 (6a44 relay anycast, RFC 6751) is reported as globally reachable

python/cpython#160227 · opened

on Oct 22, 2026

email: a header value that is itself a well-formed RFC 2047 encoded word is decoded or written verbatim, never encoded

python/cpython#160148 · opened

on Oct 21, 2026

Format `Lib/configparser.py` and its tests with `ruff format`

python/cpython#160139 · opened

on Oct 21, 2026

1

Support package.module.function for pdb breakpoint command

python/cpython#160125 · opened

on Oct 21, 2026

copy.replace loses slot-backed CSV dialect options

python/cpython#160106 · opened

on Oct 21, 2026

Refresh `zipfile.Path` from zipp 4.1.2

python/cpython#160104 · opened

on Oct 21, 2026

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Issues

mailbox.Babyl returns labels as bytes after reading a mailbox file

Incorrectly formatted error message in `asyncio.proactor_events.sendto()`

csv.Sniffer.sniff() takes quadratic time on long runs of spaces

`xml.dom.minidom.parseString()` takes quadratic time on text delivered in many pieces

`os.path.realpath()` on Windows misresolves a broken symlink reached through a directory symlink

Colorful `pprint`

tarfile and zipfile write through an existing symlink or hard link when extracting a file

selectors: modify() of poll-based selectors accepts an invalid event mask

asyncio: Windows socket reset during Proactor cleanup skips socket closure and transport detachment

Sync with importlib_metadata for Python 3.16

asyncio socket transport sends modified data when a bytearray is changed after `write()`

`lzma` and `bz2` silently ignore a damaged later stream as trailing data

One-shot `decompress()` in `gzip`, `bz2`, `lzma` and `compression.zstd` is quadratic in the number of members

`codecs.StreamReader.read()` silently drops an incomplete character at the end of the stream

The punycode incremental encoder and decoder transform each chunk separately

`http.cookiejar` skips domain checks for cookies with a negative `Version`

`tarfile` applies a hard link member's attributes through a symlink extracted in its place

Activating a venv can execute shell commands from a directory name

Creating a venv can run a local ensurepip.py

ipaddress: 192.88.99.2 (6a44 relay anycast, RFC 6751) is reported as globally reachable

email: a header value that is itself a well-formed RFC 2047 encoded word is decoded or written verbatim, never encoded

Format `Lib/configparser.py` and its tests with `ruff format`

Support package.module.function for pdb breakpoint command

copy.replace loses slot-backed CSV dialect options

Refresh `zipfile.Path` from zipp 4.1.2