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Advisory record · GHSA-xmj3-9gf7-h52w

setuptools: Windows path escape via namespace_packages.txt during legacy wheel installation Description

CVSS 4.0, no score published

Published by the GitHub Advisory Database at 23 Oct 2026, 21:44 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
setuptoolsPyPI>=38.2.2, <84.1.084.1.0
Identifiers
GHSA-xmj3-9gf7-h52w
Weakness (CWE)
CWE-22
Tags
Published
23 Oct 2026
Updated
23 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Setuptools versions 38.2.2 up to but not including 84.1.0 are affected on Windows. An attacker who can supply a wheel file to be installed through setuptools' legacy wheel installation path can cause an `__init__.py` file to be created outside the intended destination directory. The attacker can influence the location but not the file's contents. Upgrade to setuptools 84.1.0 or later.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
Not published None 4.0 CVSS:4.0/AV:L/AC:H/AT:P/PR:L/UI:A/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N GitHub Advisory Database
  • CISA KEV Not listed.
  • EPSS No score.

Timeline

  1. 31 Oct 2026, 14:08 UTC First seen by agentprime
  2. 31 Oct 2026, 14:08 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.