CVE-2026-113720

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.

CVSS

No CVSS.

References

Link	Resource
https://github.com/pypa/virtualenv/commit/35f0b33562790176dd186d0a3c517af3acc7a0e1
https://github.com/pypa/virtualenv/pull/3425
https://github.com/pypa/virtualenv/releases/tag/21.14.9
https://github.com/pypa/virtualenv/security/advisories/GHSA-fc2g-4w5p-6whm

Configurations

No configuration.

History

20 Oct 2026, 20:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-20 20:17

Updated : 2026-10-22 16:47

NVD link : CVE-2026-113720

Mitre link : CVE-2026-113720

CVE.ORG link : CVE-2026-113720

JSON object : View

Products Affected

No product.

CWE

CWE-732

Incorrect Permission Assignment for Critical Resource

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