CVE-2026-113718 (GCVE-0-2026-113718)
Vulnerability from cvelistv5 – Published: 2026-10-20 19:39 – Updated: 2026-10-20 19:39
VLAI
EPSS
VEX
Title
virtualenv: Xonsh activation literals depend on the script decoding codec
Summary
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.
Severity
CWE
- CWE-94 - Improper Control of Generation of Code ('Code Injection')
Assigner
References
4 references
| URL | Tags |
|---|---|
| https://github.com/pypa/virtualenv/security/advis… | x_refsource_CONFIRM |
| https://github.com/pypa/virtualenv/pull/3432 | x_refsource_MISC |
| https://github.com/pypa/virtualenv/commit/e5fc2e6… | x_refsource_MISC |
| https://github.com/pypa/virtualenv/releases/tag/21.14.9 | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | CPE status | |
|---|---|---|---|---|
| pypa | virtualenv |
Affected:
< 21.14.9
|
guessed |
{
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}
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"problemTypes": [
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"descriptions": [
{
"cweId": "CWE-94",
"description": "CWE-94: Improper Control of Generation of Code (\u0027Code Injection\u0027)",
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"providerMetadata": {
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},
{
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"discovery": "UNKNOWN"
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"title": "virtualenv: Xonsh activation literals depend on the script decoding codec"
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"datePublished": "2026-10-20T19:39:52.633Z",
"dateReserved": "2026-10-20T16:03:14.863Z",
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}
],
"id": "CVE-2026-113718",
"lastModified": "2026-10-22T16:47:38.403",
"metrics": {
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"Recovery": "NOT_DEFINED",
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"modifiedVulnIntegrityImpact": "NOT_DEFINED",
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"subConfidentialityImpact": "NONE",
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"valueDensity": "NOT_DEFINED",
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"version": "4.0",
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"vulnerabilityResponseEffort": "NOT_DEFINED"
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"type": "Secondary"
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"published": "2026-10-20T20:17:18.197",
"references": [
{
"source": "security-advisories@github.com",
"url": "https://github.com/pypa/virtualenv/commit/e5fc2e6e189a877ff559af288919e3525d13e5e0"
},
{
"source": "security-advisories@github.com",
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"current_release_date": "2026-10-21T20:56:57+00:00",
"cve": "CVE-2026-113718",
"id": "CVE-2026-113718",
"initial_release_date": "2026-10-20T19:39:52.633000+00:00",
"product_status:known_affected": "24",
"product_status:known_not_affected": "2",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "virtualenv: virtualenv: arbitrary code execution via improper quoting in xonsh activation scripts",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-113718.json",
"version": "3"
}
}
}
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Browse all ATT&CK techniques and the vulnerabilities related to each.
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