CRLF 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-21282492
- published21 Oct 2026
- disclosed20 Oct 2026
- creditAnthropic's OSS Scanner
Introduced: 20 Oct 2026
NewCVE-2026-113715 (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 CRLF Injection via the validate_dest path in src/virtualenv/create/via_global_ref/venv.py when using the --creator venv backend, where a virtual environment destination path containing line boundary characters is written unescaped into pyvenv.cfg. An attacker who can influence the destination path can inject arbitrary lines into pyvenv.cfg, potentially corrupting the configuration or causing tools that parse it to read attacker-controlled key-value pairs.
Note: This is only exploitable when the --creator venv option is explicitly used, as it is not the default creator backend.