GitHub Advisoryadvisory · PyPI

GHSA-jp4c-xjxw-mgf9 pip Vulnerable to Inclusion of Functionality from Untrusted Control Sphere

MEDIUM Published 2026-04-27 Modified 2026-05-05 Official page ↗
Aliases
CVE-2026-6357
Ecosystem
PyPI
Packages
pip
Severity
Moderate
CVSS vector
CVSS:4.0/AV:L/AC:L/AT:P/PR:H/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Weaknesses
CWE-829
Reviewed
2026-05-05

Affected packages

• PyPI pip: < 26.1 → fixed in 26.1

Description

pip prior to version 26.1 would run self-update check functionality after installing wheel files which required importing well-known Python modules names. These module imports were intentionally deferred to increase startup time of the pip CLI. The patch changes self-update functionality to run before wheels are installed to prevent newly-installed modules from being imported shortly after the installation of a wheel package. Users should still review package contents prior to installation.

Related

Alias · CVE (1)

  • CVE-2026-6357 pip prior to version 26.1 would run self-update check functionality after installing wheel files which required importing well-known Python… vulnerability

Weakness · CWE (1)

  • CWE-829 Inclusion of Functionality from Untrusted Control Sphere weakness

References