RCE in Pypa Virtualenv
CVE-2026-102937
virtualenv is a tool for creating isolated virtual python environments. Prior to 21.7.12, BatchActivator.quote() returns prompt text unchanged before activate.bat inserts it into a cmd.exe set "VAR=value" statement. An attacker who influences --prompt, VIRTUALENV_PROMPT, or the corresponding configuration value can include a double quote that closes the assignment and leaves following cmd.exe operators as executable syntax. When a user activates the generated Windows environment, the injected commands run with that user's privileges. This issue is fixed in version 21.7.12.
Vulnerability class: Command Injection (OS Command Injection)
Published .
EPSS exploit prediction
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Affected products
- Pypa Virtualenv — versions < 21.7.12