CVE-2026-22702— virtualenv Has TOCTOU Vulnerabilities in Directory Creation
Quick assessment
Affected
pypa virtualenv
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Virtualenv是Python Packaging Authority开源的一款Python虚拟环境构建器。 virtualenv 20.36.1之前版本存在竞争条件问题漏洞，该漏洞源于目录创建操作中存在TOCTOU漏洞，可能导致基于符号链接的攻击。
Possible ATT&CK Techniques 1 AI
T1222.003
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I. Basic Information for CVE-2026-22702
Vulnerability Information
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Vulnerability Title
virtualenv Has TOCTOU Vulnerabilities in Directory Creation
Source: CVE Program / CVE List V5
Vulnerability Description
virtualenv is a tool for creating isolated virtual python environments. Prior to version 20.36.1, TOCTOU (Time-of-Check-Time-of-Use) vulnerabilities in virtualenv allow local attackers to perform symlink-based attacks on directory creation operations. An attacker with local access can exploit a race condition between directory existence checks and creation to redirect virtualenv's app_data and lock file operations to attacker-controlled locations. This issue has been patched in version 20.36.1.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
在文件访问前对链接解析不恰当(链接跟随)
Source: CVE Program / CVE List V5
Vulnerability Title
virtualenv 竞争条件问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Virtualenv是Python Packaging Authority开源的一款Python虚拟环境构建器。 virtualenv 20.36.1之前版本存在竞争条件问题漏洞，该漏洞源于目录创建操作中存在TOCTOU漏洞，可能导致基于符号链接的攻击。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| pypa | virtualenv | < 20.36.1 | - |
|
II. Public POCs for CVE-2026-22702
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-22702 (1)
Vendor Advisories for CVE-2026-22702 (1)
IV. Related Vulnerabilities
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V. Comments for CVE-2026-22702
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