-------- Forwarded Message --------
Subject: [Security-announce][CVE-2026-5271] Python install manager script
aliases search path hijack
Date: Wed, 1 Apr 2026 18:07:40 +0100
From: Steve Dower <[email protected]>
Reply-To: [email protected]
To: [email protected]
There is a MEDIUM severity vulnerability affecting the Python install manager.
Script alias entrypoints (e.g. pip.exe) generated by version 26.0 of the Python
install manager were very likely to have an empty search path, leading to
modules in the current working directory being able to override the intended
module and execute code as the user.
Version 26.1 is fixed. Versions prior to 26.0 are not impacted.
After installing the updated version, run "py install --refresh" to regenerate
existing aliases.
Please see the linked CVE ID for the latest information on
affected versions:
* https://www.cve.org/CVERecord?id=CVE-2026-5271
* https://github.com/python/pymanager/pull/301
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