CVE-2026-113716— virtualenv: Builtin creation follows linked environment directories
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 是一个用于创建隔离的虚拟 Python 环境的工具。在 21.14.9 版本之前，其内置创建器会对可执行文件目录、库目录和包目录调用 ensure_dir() 函数；而 ensure_dir() 会接受指向已有目录的符号链接，因为 exists() 函数会跟随符号链接进行判断。在解释器创建、种子安装以及激活脚本生成过程中，如果另一个本地账户已预先构建好目录树，且当前调用用户能够访问该符号链接所指向的目标路径，则相关写入操作会通过该链接写入到目标目录之外的位置。使用 --clear 选项会先删除
Possible ATT&CK Techniques 2 AI
T1565.002 · Transmitted Data Manipulation T1565.001 · Stored Data ManipulationAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| pypa | virtualenv | < 21.14.9 |
affected |
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I. Basic Information for CVE-2026-113716
Vulnerability Information
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Vulnerability Title
virtualenv: Builtin creation follows linked environment directories
Source: CVE Program / CVE List V5
Vulnerability Description
virtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.9, the builtin creator calls ensure_dir() for executable, library, and package directories, and ensure_dir() accepts an existing symlink to a directory because exists() follows it. Interpreter creation, seed installation, and activation generation then write through the linked parent outside the requested destination when another local account prepared the tree and the invoking user can access the target. The --clear option removes the planted tree first, while ordinary creation reaches it; arbitrary attacker-selected output bytes are not established. This issue is fixed in version 21.14.9.
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
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| pypa | virtualenv | < 21.14.9 | - |
|
II. Public POCs for CVE-2026-113716
| # | POC Description | Source Link | Shenlong Link |
|---|
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Patches & Fixes for CVE-2026-113716 (2)
Vendor Advisories for CVE-2026-113716 (1)
Vendor Pages for CVE-2026-113716 (1)
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Release 21.14.9 · pypa/virtualenv · GitHub x_refsource_MISC
Same Patch Batch · pypa · 2026-10-20 · 16 CVEs total
| CVE-2026-113722 | 7.8 HIGH | virtualenv: Generated POSIX console launchers interpret destination paths as shell syntax |
| CVE-2026-113725 | 7.8 HIGH | virtualenv bash activate runs commands from an environment name with a backslash before $ |
| CVE-2026-113726 | 7.8 HIGH | virtualenv activate runs commands from the environment name in zsh with PROMPT_SUBST |
| CVE-2026-113776 | 7.8 HIGH | virtualenv activation scripts run code from a path that contains a placeholder name |
| CVE-2026-113732 | 7.8 HIGH | virtualenv activate.fish runs commands from a path or prompt with a backslash before a quo |
| CVE-2026-113718 | 7.1 HIGH | virtualenv: Xonsh activation literals depend on the script decoding codec |
| CVE-2026-113723 | 7.1 HIGH | virtualenv: Bash prompt values can change meaning under older compatibility modes |
| CVE-2026-113719 | 4.5 MEDIUM | virtualenv: Seed replacement does not contain metadata deletion paths |
| CVE-2026-113724 | 4.5 MEDIUM | virtualenv: Deletion recovery can change a symlink target's mode |
| CVE-2026-113721 | 4.5 MEDIUM | virtualenv: Generated files can follow existing destination links |
| CVE-2026-113713 | 4.4 MEDIUM | virtualenv: Temporary app-data can leave dangling seed package links |
| CVE-2026-113720 | 4.4 MEDIUM | virtualenv: Seeded files retain permissions from an older cache |
| CVE-2026-113714 | 2.3 LOW | virtualenv: Downloaded wheel selection and caching precede verification |
| CVE-2026-113717 | 2.3 LOW | virtualenv: Pip seeding with download omits wheel digest verification |
| CVE-2026-113715 | 2.0 LOW | virtualenv: Venv configuration readback can reinterpret path boundaries |
IV. Related Vulnerabilities
Same product: virtualenv
-
CVE-2026-113726
virtualenv activate runs commands from the environment name -
CVE-2026-113776
virtualenv activation scripts run code from a path that cont -
CVE-2026-113732
virtualenv activate.fish runs commands from a path or prompt -
CVE-2026-113725
virtualenv bash activate runs commands from an environment n -
CVE-2026-113724
virtualenv: Deletion recovery can change a symlink target's
Same vendor: pypa
-
CVE-2026-113726
virtualenv activate runs commands from the environment name -
CVE-2026-113776
virtualenv activation scripts run code from a path that cont -
CVE-2026-113732
virtualenv activate.fish runs commands from a path or prompt -
CVE-2026-113725
virtualenv bash activate runs commands from an environment n -
CVE-2026-113724
virtualenv: Deletion recovery can change a symlink target's
Same weakness: CWE-59
-
CVE-2026-113724
virtualenv: Deletion recovery can change a symlink target's -
CVE-2026-113721
virtualenv: Generated files can follow existing destination -
CVE-2026-113678
Froxlor before 2.3.15 Symlink Following Privilege Escalation -
CVE-2026-112936
filelock: ReadWriteLock follows a symlink at the lock path i -
CVE-2026-112912
filelock: Symlink swap during SoftFileLock's writability che
V. Comments for CVE-2026-113716
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