Python EUVD-2026-25857

| CVE-2026-6357 MEDIUM
Inclusion of Functionality from Untrusted Control Sphere (CWE-829)
2026-04-27 PSF
Information Disclosure Python
5.3
CVSS 4.0
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CVSS VectorNVD

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Attack Vector
Local
Attack Complexity
Low
Privileges Required
High
User Interaction
A
Scope
X

Lifecycle Timeline

1
CVSS changed
Apr 27, 2026 - 15:22 NVD
5.3 (MEDIUM)

DescriptionNVD

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.

Analysis

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. …

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EUVD-2026-25857 vulnerability details – vuln.today
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