high7.1
CVE-2026-113718
virtualenv: Xonsh activation literals depend on the script decoding codec
Impact
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.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | virtualenv | < 21.14.9 | 21.14.9 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-394h-qwmc-48pf
- https://github.com/pypa/virtualenv/security/advisories/GHSA-394h-qwmc-48pf
- https://nvd.nist.gov/vuln/detail/CVE-2026-113718
- https://github.com/pypa/virtualenv/pull/3432
- https://github.com/pypa/virtualenv/commit/e5fc2e6e189a877ff559af288919e3525d13e5e0
- https://github.com/pypa/virtualenv/releases/tag/21.14.9