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gh-134873: Fix quadratic complexity in os.path.expandvars()

awaiting core review

needs backport to 3.10only security fixesonly security fixes

needs backport to 3.11only security fixesonly security fixes

needs backport to 3.12only security fixesonly security fixes

needs backport to 3.13bugs and security fixesbugs and security fixes

needs backport to 3.14bugs and security fixesbugs and security fixes

needs backport to 3.9only security fixesonly security fixes

type-securityA security issueA security issue

Status: Open (in progress).

python/cpythonnumber 134952

#134952 In python/cpython;

· serhiy-storchaka opened on May 30, 2025

gh-134873: fix various quadratic worst-time complexities in <code>_header_value_parser.py</code> [WIP]

needs backport to 3.10only security fixesonly security fixes

needs backport to 3.11only security fixesonly security fixes

needs backport to 3.12only security fixesonly security fixes

needs backport to 3.13bugs and security fixesbugs and security fixes

needs backport to 3.14bugs and security fixesbugs and security fixes

needs backport to 3.9only security fixesonly security fixes

type-securityA security issueA security issue

Status: Draft (not ready).

python/cpythonnumber 134947

#134947 In python/cpython;

· picnixz opened on May 30, 2025

gh-119452: Fix OOM vulnerability in http.server

needs backport to 3.10only security fixesonly security fixes

needs backport to 3.11only security fixesonly security fixes

needs backport to 3.12only security fixesonly security fixes

needs backport to 3.13bugs and security fixesbugs and security fixes

needs backport to 3.14bugs and security fixesbugs and security fixes

needs backport to 3.9only security fixesonly security fixes

type-securityA security issueA security issue

Status: Draft (not ready).

python/cpythonnumber 119455

#119455 In python/cpython;

· serhiy-storchaka opened on May 23, 2024

gh-119451: Fix OOM vulnerability in http.client

needs backport to 3.10only security fixesonly security fixes

needs backport to 3.11only security fixesonly security fixes

needs backport to 3.12only security fixesonly security fixes

needs backport to 3.13bugs and security fixesbugs and security fixes

needs backport to 3.14bugs and security fixesbugs and security fixes

needs backport to 3.9only security fixesonly security fixes

type-securityA security issueA security issue

Status: Draft (not ready).

python/cpythonnumber 119454

#119454 In python/cpython;

· serhiy-storchaka opened on May 23, 2024

gh-119342: Fix OOM vulnerability in plistlib

needs backport to 3.10only security fixesonly security fixes

needs backport to 3.11only security fixesonly security fixes

needs backport to 3.12only security fixesonly security fixes

needs backport to 3.13bugs and security fixesbugs and security fixes

needs backport to 3.14bugs and security fixesbugs and security fixes

needs backport to 3.9only security fixesonly security fixes

type-securityA security issueA security issue

Status: Draft (not ready).

python/cpythonnumber 119343

#119343 In python/cpython;

· serhiy-storchaka opened on May 21, 2024