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tarfile: memory exhaustion via oversized extended-header (GNU long name / pax) size field

stdlibStandard Library Python modules in the Lib/ directoryStandard Library Python modules in the Lib/ directory

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

Status: Open.

#151497 In python/cpython;

· iamsharduld opened on Jun 15, 2026

test_dtrace can hang indefinitely when bpftrace usability check times out

testsTests in the Lib/test dirTests in the Lib/test dir

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

Status: Open.

#151496 In python/cpython;

· StanFromIreland opened on Jun 15, 2026

subprocess.CalledProcessError misquotes list-style commands

stdlibStandard Library Python modules in the Lib/ directoryStandard Library Python modules in the Lib/ directory

topic-subprocessSubprocess issues.Subprocess issues.

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

Status: Open.

#151485 In python/cpython;

· BenjyWiener opened on Jun 15, 2026

Make PyCodeObject._co_unique_id conditional on Py_GIL_DISABLED

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#151483 In python/cpython;

· weixlu opened on Jun 15, 2026

faulthandler: data races in enable()/disable() and dump_traceback_later() under free threading

extension-modulesC modules in the Modules dirC modules in the Modules dir

topic-free-threading

type-crashA hard crash of the interpreter, possibly with a core dumpA hard crash of the interpreter, possibly with a core dump

Status: Open.

#151475 In python/cpython;

· devdanzin opened on Jun 14, 2026

IDLE - colorize type as a soft keyword when it begins a statememt

easy

stdlibStandard Library Python modules in the Lib/ directoryStandard Library Python modules in the Lib/ directory

topic-IDLE

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

Status: Open.

#151471 In python/cpython;

· Locked-chess-official opened on Jun 14, 2026

Tokenizer produces token '<>', missing in the language grammar (regardless on __future__.barry_as_FLUFL settings)

interpreter-core(Objects, Python, Grammar, and Parser dirs)(Objects, Python, Grammar, and Parser dirs)

topic-parser

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

Status: Open.

#151464 In python/cpython;

· skirpichev opened on Jun 14, 2026

Docs: the dis module does not document the show_jit parameter

docsDocumentation in the Doc dirDocumentation in the Doc dir

Status: Open.

#151456 In python/cpython;

· iamsharduld opened on Jun 13, 2026

email.message.Message.add_header behavior differs from Message[header]=v

stdlibStandard Library Python modules in the Lib/ directoryStandard Library Python modules in the Lib/ directory

topic-email

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

Status: Open.

#151454 In python/cpython;

· Gumnos opened on Jun 13, 2026

_remote_debugging: Missing last_profiled_frame updates in coroutines, generators, etc.

extension-modulesC modules in the Modules dirC modules in the Modules dir

topic-profiling

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

Status: Open.

#151436 In python/cpython;

· maurycy opened on Jun 13, 2026

Remove unused imports (June 2026)

stdlibStandard Library Python modules in the Lib/ directoryStandard Library Python modules in the Lib/ directory

type-refactorCode refactoring (with no changes in behavior)Code refactoring (with no changes in behavior)

Status: Open.

#151428 In python/cpython;

· ByteFlowing1337 opened on Jun 13, 2026

os.getresuid() and os.getresgid() are not present in MacOS/Python 3.14.5, but are documented

docsDocumentation in the Doc dirDocumentation in the Doc dir

Status: Open.

#151427 In python/cpython;

· athornton opened on Jun 13, 2026