CVE-2026-113720 (GCVE-0-2026-113720)
Vulnerability from cvelistv5 – Published: 2026-10-20 19:43 – Updated: 2026-10-21 15:52
VLAI
EPSS
VEX
Title
virtualenv: Seeded files retain permissions from an older cache
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-21 14:24 UTC
CWE
- CWE-732 - Incorrect Permission Assignment for Critical Resource
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/pypa/virtualenv/security/advis… | x_refsource_CONFIRM |
| https://github.com/pypa/virtualenv/pull/3425 | x_refsource_MISC |
| https://github.com/pypa/virtualenv/commit/35f0b33… | x_refsource_MISC |
| https://github.com/pypa/virtualenv/releases/tag/21.14.9 | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| pypa | virtualenv |
Affected:
< 21.14.9
|
guessed |
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| Author | Source | Type | Date | Other |
|---|
Nomenclature
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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