Medium 5.3Published Apr 27, 2026

CVE-2026-6357pip self-update functionality can import newly installed modules after wheel installation

Updated under an hour ago (Oct 27, 2026, 4:00 PM ET)

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It affects Pip maintainers pip. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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.

CVSS: 5.3 MEDIUM (v4.0, CNA)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
Weakness (CWE): CWE-829
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: PSF
NVD analysis: Awaiting Analysis
Record last updated: Apr 27, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Pip maintainers pip pip_maintainers:pip (from the name)	before 26.1	CNA record

References

References

https://github.com/pypa/pip/pull/13923	patch
https://ichard26.github.io/blog/2026/04/whats-new-in-pip-26.1/#security-fixes	vendor-advisory
http://www.openwall.com/lists/oss-security/2026/04/27/7

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.