CVE-2026-113732— virtualenv activate.fish runs commands from a path or prompt with a backslash before a quote
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 21.14.2 版本之前，FishActivator 继承了 ViaTemplateActivator.quote() 方法，该方法使用了 POSIX 风格的 shlex.quote()；然而，Fish shell 对反斜杠和单引号的处理方式与 POSIX 不同。因此，如果攻击者能够影响环境路径、--prompt 参数或 VIRTUALENV_PROMPT 环境变量，并在引号前插入反斜杠，则可在用户执行 source activate.f
Possible ATT&CK Techniques 3 AI
T1059.005 · Visual Basic T1059 · Command and Scripting Interpreter T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-113732
Vulnerability Information
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Vulnerability Title
virtualenv activate.fish runs commands from a path or prompt with a backslash before a quote
Source: CVE Program / CVE List V5
Vulnerability Description
virtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.2, FishActivator inherits ViaTemplateActivator.quote(), which uses POSIX shlex.quote() even though fish interprets backslashes and single quotes differently. An attacker-influenced environment path, --prompt, or VIRTUALENV_PROMPT value containing a backslash before a quote can therefore terminate the generated fish literal and execute command substitution when the user sources activate.fish. This issue is fixed in version 21.14.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
OS命令中使用的特殊元素转义处理不恰当(OS命令注入)
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| pypa | virtualenv | < 21.14.2 | - |
|
II. Public POCs for CVE-2026-113732
| # | POC Description | Source Link | Shenlong Link |
|---|
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Other References for CVE-2026-113732 (3)
-
https://github.com/pypa/virtualenv/releases/tag/21.14.2 x_refsource_MISC
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https://github.com/pypa/virtualenv/security/advisories/GHSA-c947-3pg5-gm8q x_refsource_CONFIRM
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-2026-113718 | 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-2026-113716 | 4.5 MEDIUM | virtualenv: Builtin creation follows linked environment directories |
| 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
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CVE-2026-113726
virtualenv activate runs commands from the environment name -
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CVE-2026-113723
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Same vendor: pypa
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CVE-2026-113726
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CVE-2026-113723
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Same weakness: CWE-78
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V. Comments for CVE-2026-113732
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