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Reject leading dashes in webbrowser.open()

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

type-securityA security issueA security issue

Status: Open.

#143930 In python/cpython;

· sethmlarson opened on Jan 16, 2026

Outdated statement in docs comparing pickle with marshal

docsDocumentation in the Doc dirDocumentation in the Doc dir

Status: Open.

#143928 In python/cpython;

· aescarias opened on Jan 16, 2026

Normalize all line ending (CR, CRLF, and LF) to LF+TAB in configparser

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

type-securityA security issueA security issue

Status: Open.

#143927 In python/cpython;

· sethmlarson opened on Jan 16, 2026

Reject control characters in data: URL mediatypes

type-securityA security issueA security issue

Status: Open.

#143925 In python/cpython;

· sethmlarson opened on Jan 16, 2026

Reject control characters in POP3 commands

type-securityA security issueA security issue

Status: Open.

#143923 In python/cpython;

· sethmlarson opened on Jan 16, 2026

Reject control characters in IMAP commands

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

type-securityA security issueA security issue

Status: Open.

#143921 In python/cpython;

· sethmlarson opened on Jan 16, 2026

Reject control characters in http.cookies.Morsel

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

type-securityA security issueA security issue

Status: Open.

#143919 In python/cpython;

· sethmlarson opened on Jan 16, 2026

Reject control characters in wsgiref.headers.Headers

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

type-securityA security issueA security issue

Status: Open.

#143916 In python/cpython;

· sethmlarson opened on Jan 16, 2026

os.rename documentation about atomic replace misleading

docsDocumentation in the Doc dirDocumentation in the Doc dir

Status: Open.

#143909 In python/cpython;

· b-jonas0 opened on Jan 16, 2026

Replace IndexError with OverflowError in struct.pack_into()

3.15new features, bugs and security fixesnew features, bugs and security fixes

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

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#143904 In python/cpython;

· serhiy-storchaka opened on Jan 16, 2026

Make isxidstart() and isxidcontinue() module only functions in unicodedata

3.15new features, bugs and security fixesnew features, bugs and security fixes

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

type-featureA feature request or enhancementA feature request or enhancement

Status: Open.

#143897 In python/cpython;

· serhiy-storchaka opened on Jan 16, 2026

functools.singledispatch registration prioritizes the types of normal arguments before positional-only ones

3.13bugs and security fixesbugs and security fixes

3.14bugs and security fixesbugs and security fixes

3.15new features, bugs and security fixesnew features, bugs and security fixes

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.

#143886 In python/cpython;

· pR0Ps opened on Jan 15, 2026