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CVE-2026-113725— virtualenv bash activate runs commands from an environment name with a backslash before $

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 Python 虚拟环境的工具。在 21.14.7 版本之前，其 Bash 激活脚本（activate）仅对 Bash 处理 PS1 变量时的两次遍历中的一次进行了环境名称的转义处理。因此，如果环境名称中包含反斜杠（\），就会抵消转义效果；若名称中包含 ，则每次 Bash 绘制提示符时，该表达式都会作为命令在用户 Shell 中执行。该问题已在 21.14.7 版本中修复。

CVSS 7.8 · High
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I. Basic Information for CVE-2026-113725

Vulnerability Information
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Vulnerability Title
virtualenv bash activate runs commands from an environment name with a backslash before $
Source: CVE Program / CVE List V5
Vulnerability Description
virtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.7, the bash activate script escapes the environment name for only one of the two passes bash makes over PS1, so a backslash in the name undoes the escaping and a name containing \$(...) runs as commands in the user's shell each time bash draws the prompt. This issue is fixed in version 21.14.7.
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 < 21.14.7 -

II. Public POCs for CVE-2026-113725

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III. Intelligence Information for CVE-2026-113725

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Other References for CVE-2026-113725 (3)

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-2026-113726 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-2026-113716 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
Same vendor: pypa
Same weakness: CWE-78

V. Comments for CVE-2026-113725

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