Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-113776— virtualenv activation scripts run code from a path that contains a placeholder name

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 20.26.6 到 21.14.2 版本之间，ViaTemplateActivator.instantiate_template() 方法会逐键对整个激活模板进行占位符替换。因此，若已替换并加引号的环境路径或提示符中仍包含如 __VIRTUAL_NAME__、__VIRTUAL_ENV__ 或 __VIRTUAL_PROMPT__ 等触发名称，这些名称可能在后续替换过程中被再次替换。当用户通过 bash、fish、xonsh 或 acti

CVSS 7.8 · High

Possible ATT&CK Techniques 1 AI

T1203.002
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-113776

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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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 activation scripts run code from a path that contains a placeholder name
Source: CVE Program / CVE List V5
Vulnerability Description
virtualenv is a tool for creating isolated virtual python environments. From 20.26.6 until 21.14.2, ViaTemplateActivator.instantiate_template() replaces placeholders one key at a time across the complete activation template, so trigger names such as __VIRTUAL_NAME__, __VIRTUAL_ENV__, or __VIRTUAL_PROMPT__ inside an already substituted and quoted environment path or prompt can be replaced during a later pass. The later value's quoting can close the earlier literal and execute the remaining path when a user activates the environment through bash, fish, xonsh, or activate_this.py. The distinct csh prompt-display token __VIRTUAL_PROMPT_DISPLAY_TCSH__ can instead break the generated script without establishing command execution. The attacker must influence the destination path or --prompt, and a value without a relevant placeholder name does not trigger this mechanism. 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 >= 20.26.6, < 21.14.2 -

II. Public POCs for CVE-2026-113776

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-113776

请登录查看更多情报信息。

Other References for CVE-2026-113776 (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-2026-113725 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-2026-113732 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-2026-113776

No comments yet

Leave a comment