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.
History

Wed, 06 May 2026 00:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-94
References
Metrics threat_severity

None

cvssV3_1

{'score': 5.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N'}

threat_severity

Moderate


Tue, 28 Apr 2026 04:00:00 +0000

Type Values Removed Values Added
First Time appeared Pypa
Pypa pip
Vendors & Products Pypa
Pypa pip

Mon, 27 Apr 2026 23:30:00 +0000

Type Values Removed Values Added
References

Mon, 27 Apr 2026 17:15:00 +0000

Type Values Removed Values Added
Weaknesses CWE-829
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Mon, 27 Apr 2026 15:00:00 +0000

Type Values Removed Values Added
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.
Title pip self-update functionality can import newly installed modules after wheel installation
References
Metrics cvssV4_0

{'score': 5.3, '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'}


cve-icon MITRE

Status: PUBLISHED

Assigner: PSF

Published: 2026-04-27T14:19:47.657Z

Updated: 2026-04-27T22:17:49.582Z

Reserved: 2026-04-15T13:55:02.734Z

Link: CVE-2026-6357

cve-icon Vulnrichment

Updated: 2026-04-27T22:17:49.582Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-04-27T15:16:20.857

Modified: 2026-04-27T23:16:03.533

Link: CVE-2026-6357

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-04-27T14:19:47Z

Links: CVE-2026-6357 - Bugzilla