# CVE-2026-6357

> Vulnerability.

## 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.

## Key facts

- **CVE ID:** CVE-2026-6357
- **Published:** 2026-04-27
- **CWE codes:** CWE-829

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-6357

## Citation

> AI Analytics. CVE-2026-6357. Retrieved 2026-07-23 from https://api.ai-analytics.org/cve/CVE-2026-6357. Derived from NIST NVD. Licensed CC0.

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