---
id: CVE-2026-3087
title: >-
  If `shutil.unpack_archive()` is given a ZIP archive with an absolute Windows
  path containing a drive (`C:\\...`) then the archive will be extracted outside
  the target directory which is different than other operating systems
summary: >-
  If `shutil.unpack_archive()` is given a ZIP archive with an absolute Windows
  path containing a drive (`C:\\...`) then the archive will be extracted outside
  the target directory which is different than other operating systems. Only
  Window…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N'
cwe:
  - CWE-22
vendor: python
product: python
affected:
  - python <= 3.14.4
  - python = 3.15.0
published: '2026-04-27'
updated: '2026-08-05'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-3087'
references:
  - url: >-
      https://github.com/python/cpython/commit/65b255416ae217bf0e22085be3c1976cea18bd8c
    label: cna@python.org
  - url: >-
      https://github.com/python/cpython/commit/8e13025747e1ca72e86d1f35637123f9c306f0cb
    label: cna@python.org
  - url: >-
      https://github.com/python/cpython/commit/8ee6aff14054b37b53e47194a2fa313e98163c94
    label: cna@python.org
  - url: >-
      https://github.com/python/cpython/commit/a6650a2cdf0c49fb8ce0c982903aa2aa274beefe
    label: cna@python.org
  - url: >-
      https://github.com/python/cpython/commit/ab5ef98af693bded74a738570e81ea70abef2840
    label: cna@python.org
  - url: >-
      https://github.com/python/cpython/commit/b01e594fbe754a960212f908d047294e880b52fd
    label: cna@python.org
  - url: >-
      https://github.com/python/cpython/commit/ba0aca3bffce431fe2fbd53ca4cd6a717a2e2c19
    label: cna@python.org
  - url: >-
      https://github.com/python/cpython/commit/fc829e88753858c8ac669594bf0093f44948c0f4
    label: cna@python.org
  - url: 'https://github.com/python/cpython/issues/146581'
    label: cna@python.org
  - url: 'https://github.com/python/cpython/pull/146591'
    label: cna@python.org
  - url: >-
      https://mail.python.org/archives/list/security-announce@python.org/thread/X6FXE5C6KDKOVNX3EC3DWD5RUPFWOZA4/
    label: cna@python.org
  - url: 'http://www.openwall.com/lists/oss-security/2026/04/28/9'
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.00551
epssPercentile: 0.44718
ingestedAt: '2026-08-05T13:48:02.172Z'
---

## Overview

If `shutil.unpack_archive()` is given a ZIP archive with an absolute Windows path containing a drive (`C:\\...`) then the archive will be extracted outside the target directory which is different than other operating systems. Only Windows is affected by this vulnerability.

## Affected

- `python <= 3.14.4`
- `python = 3.15.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.