CVE-2026-113718
High
Description
virtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.9, POSIX xonsh activation quote() uses repr() to write printable non-ASCII prompt or destination data into UTF-8 activate.xsh, while xonsh can read that script using $XONSH_ENCODING. Under a legacy multibyte codec such as GBK or Big5, a UTF-8 trail byte can consume the backslash before an adjacent quote, allowing the literal to close and attacker-influenced statements to execute when the user sources the generated script. This issue is fixed in version 21.14.9.
SeverityHigh
CVSS7.1
Exploit probability—
ProductVirtualenv
PublishedOct 20, 2026
First seenOct 20, 2026
Weakness typeCWE-94Code injection
How to fix
Update
- virtualenv21.14.9 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| virtualenvPyPI | v < 21.14.9 | 21.14.9 |
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