CVE-2026-113726— virtualenv activate runs commands from the environment name in zsh with PROMPT_SUBST
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 21.13.0 之前，由 zsh 同样加载的 bash 激活脚本未对环境名称进行转义；从 21.13.0 到 21.14.4 版本，该脚本仅在设置了 BASH_VERSION 变量时才对反斜杠、美元符号和反引号进行转义，导致 zsh 接收到未转义的原始值。该脚本会将此值赋值给 PS1 变量。因此，在启用了 PROMPT_SUBST 的 zsh 环境中，如果攻击者能够影响环境目录名称、--prompt 参数或 VIRTUALENV_PROM
Possible ATT&CK Techniques 3 AI
T1210 · Exploitation of Remote Services T1059 · Command and Scripting Interpreter T1190 · Exploit Public-Facing Application
Get alerts for future matching vulnerabilities
Log in to subscribe
I. Basic Information for CVE-2026-113726
Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗
Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.
Vulnerability Title
virtualenv activate runs commands from the environment name in zsh with PROMPT_SUBST
Source: CVE Program / CVE List V5
Vulnerability Description
virtualenv is a tool for creating isolated virtual python environments. Prior to 21.13.0, the bash activate script that zsh also sources leaves the environment name unescaped; from 21.13.0 until 21.14.4, it escapes backslashes, dollar signs, and backticks only when BASH_VERSION is set, so zsh receives the raw value. The script assigns that value to PS1. In zsh with PROMPT_SUBST, an attacker-influenced environment directory, --prompt, or VIRTUALENV_PROMPT value containing command, parameter, or arithmetic expansion syntax can therefore execute commands in the user's shell each time the prompt is drawn. A percent sign is separately interpreted as a zsh prompt escape but does not by itself execute commands. Plain zsh with PROMPT_SUBST disabled and bash are not affected by this mechanism. This issue is fixed in version 21.14.4.
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 | < 21.14.4 | - |
|
II. Public POCs for CVE-2026-113726
| # | POC Description | Source Link | Shenlong Link |
|---|
AI-Generated POC
Premium
No public POC found.
Login to generate AI POCIII. Intelligence Information for CVE-2026-113726
请登录查看更多情报信息。
Other References for CVE-2026-113726 (3)
-
https://github.com/pypa/virtualenv/releases/tag/21.14.4 x_refsource_MISC
-
https://github.com/pypa/virtualenv/security/advisories/GHSA-5vjq-rrrf-7h2q 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-2026-113776 | 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
-
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 -
CVE-2026-113723
virtualenv: Bash prompt values can change meaning under olde
Same vendor: pypa
-
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 -
CVE-2026-113723
virtualenv: Bash prompt values can change meaning under olde
Same weakness: CWE-78
-
CVE-2026-105044
OS Command Injection in Qingteng Host Adaptive Security Plat -
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-2026-35499
Totolink X2000R V1.0.0 存在 OS 命令注入漏洞 -
CVE-2026-40627
TOTOLINK X2000R V1.0.0 命令注入漏洞
V. Comments for CVE-2026-113726
No comments yet