Command Injection Affecting virtualenv package, versions [21.14.8,21.14.9)
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PYTHON-VIRTUALENV-21282488
- published21 Oct 2026
- disclosed20 Oct 2026
- creditAnthropic's OSS Scanner
Introduced: 20 Oct 2026
NewCVE-2026-113722 (opens in a new tab)How to fix?
Upgrade virtualenv to version 21.14.9 or higher.
Overview
Affected versions of this package are vulnerable to Command Injection via the seed mechanism's console script launcher rewriting logic in pip_invoke.py on POSIX systems. When a virtual environment is created and pip installs packages with console scripts, the interpreter path embedded in script shebangs may contain spaces, causing pip to generate a /bin/sh-based wrapper shebang. The _rewrite_launchers method rewrites these scripts to use the correct interpreter path but does so by unlinking and recreating the file, which can allow a local attacker with write access to the script directory to replace the file between the unlink and open calls, potentially gaining elevated execution privileges through the recreated script.