4.4
Medium
CVE-2026-113720 virtualenv is a tool for creating isolated virtual python environments
Description
virtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.9, the app-data copy seeder uses shutil.copy() to copy cached package files into later environments, causing cached source modes to override the current run's umask. A cache populated under a permissive umask can therefore produce files writable by another local account in a later traversable environment, allowing package code such as pip/__init__.py to be modified and executed by the environment owner. The attacker cannot force the earlier umask, and a private destination parent prevents access. This issue is fixed in version 21.14.9.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| virtualenv 21.14 | earliest → < 21.14.9 | 21.14.9 |
References
- github.com github.com
- github.com github.com
- github.com github.com
- github.com github.com
Timeline
- Published
- Last modified
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