UBUNTU-CVE-2026-102937 (CVE-2026-102937)
Vulnerability from osv_ubuntu – Published: 2026-09-29 21:17 – Updated: 2026-09-29 21:17 – Source website
VLAI
Details
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.
Severity
N/A (UNKNOWN)
References
{
"affected": [
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python-virtualenv",
"binary_version": "1.11.4-1ubuntu1"
}
]
},
"package": {
"ecosystem": "Ubuntu:14.04:LTS",
"name": "python-virtualenv",
"purl": "pkg:deb/ubuntu/python-virtualenv@1.11.4-1ubuntu1?arch=source\u0026distro=trusty"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.10.1-1",
"1.11-1",
"1.11-2",
"1.11.4-1",
"1.11.4-1ubuntu1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python-virtualenv",
"binary_version": "15.0.1+ds-3ubuntu1.1"
},
{
"binary_name": "python3-virtualenv",
"binary_version": "15.0.1+ds-3ubuntu1.1"
},
{
"binary_name": "virtualenv",
"binary_version": "15.0.1+ds-3ubuntu1.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:16.04:LTS",
"name": "python-virtualenv",
"purl": "pkg:deb/ubuntu/python-virtualenv@15.0.1+ds-3ubuntu1.1?arch=source\u0026distro=xenial"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"1.11.6+ds-1",
"14.0.5+ds-1",
"14.0.5+ds-2",
"14.0.5+ds-4",
"15.0.0+ds-1",
"15.0.0+ds-2",
"15.0.1+ds-1",
"15.0.1+ds-2",
"15.0.1+ds-3",
"15.0.1+ds-3ubuntu1",
"15.0.1+ds-3ubuntu1.1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python-virtualenv",
"binary_version": "15.1.0+ds-1.1"
},
{
"binary_name": "python3-virtualenv",
"binary_version": "15.1.0+ds-1.1"
},
{
"binary_name": "virtualenv",
"binary_version": "15.1.0+ds-1.1"
}
]
},
"package": {
"ecosystem": "Ubuntu:18.04:LTS",
"name": "python-virtualenv",
"purl": "pkg:deb/ubuntu/python-virtualenv@15.1.0+ds-1.1?arch=source\u0026distro=bionic"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"15.1.0+ds-1",
"15.1.0+ds-1.1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python3-virtualenv",
"binary_version": "20.0.17-1ubuntu0.4+esm1"
},
{
"binary_name": "virtualenv",
"binary_version": "20.0.17-1ubuntu0.4+esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:20.04:LTS",
"name": "python-virtualenv",
"purl": "pkg:deb/ubuntu/python-virtualenv@20.0.17-1ubuntu0.4+esm1?arch=source\u0026distro=esm-apps/focal"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"15.1.0+ds-2",
"15.1.0+ds-2build1",
"15.1.0+ds-2ubuntu1",
"20.0.13-1",
"20.0.17-1",
"20.0.17-1ubuntu0.3",
"20.0.17-1ubuntu0.4",
"20.0.17-1ubuntu0.4+esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python3-virtualenv",
"binary_version": "20.13.0+ds-2ubuntu0.1~esm1"
},
{
"binary_name": "virtualenv",
"binary_version": "20.13.0+ds-2ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:22.04:LTS",
"name": "python-virtualenv",
"purl": "pkg:deb/ubuntu/python-virtualenv@20.13.0+ds-2ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/jammy"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"20.4.6+ds-2",
"20.10.0+ds-1",
"20.12.1+ds-1",
"20.13.0+ds-1",
"20.13.0+ds-2",
"20.13.0+ds-2ubuntu0.1~esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python3-virtualenv",
"binary_version": "20.25.0+ds-2ubuntu0.1~esm1"
},
{
"binary_name": "virtualenv",
"binary_version": "20.25.0+ds-2ubuntu0.1~esm1"
}
]
},
"package": {
"ecosystem": "Ubuntu:Pro:24.04:LTS",
"name": "python-virtualenv",
"purl": "pkg:deb/ubuntu/python-virtualenv@20.25.0+ds-2ubuntu0.1~esm1?arch=source\u0026distro=esm-apps/noble"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"20.24.1+ds-1",
"20.24.6+ds-1",
"20.24.6+ds-2",
"20.25.0+ds-1",
"20.25.0+ds-2",
"20.25.0+ds-2ubuntu0.1~esm1"
]
},
{
"ecosystem_specific": {
"binaries": [
{
"binary_name": "python3-virtualenv",
"binary_version": "20.36.1+ds-1"
},
{
"binary_name": "virtualenv",
"binary_version": "20.36.1+ds-1"
}
]
},
"package": {
"ecosystem": "Ubuntu:26.04:LTS",
"name": "python-virtualenv",
"purl": "pkg:deb/ubuntu/python-virtualenv@20.36.1+ds-1?arch=source\u0026distro=resolute"
},
"ranges": [
{
"events": [
{
"introduced": "0"
}
],
"type": "ECOSYSTEM"
}
],
"versions": [
"20.31.2+ds-1",
"20.35.3+ds-1",
"20.35.4+ds-1",
"20.36.1+ds-1"
]
}
],
"aliases": [],
"details": "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\u0027s privileges. This issue is fixed in version 21.7.12.",
"id": "UBUNTU-CVE-2026-102937",
"modified": "2026-09-29T21:17:00Z",
"published": "2026-09-29T21:17:00Z",
"references": [
{
"type": "REPORT",
"url": "https://ubuntu.com/security/CVE-2026-102937"
},
{
"type": "REPORT",
"url": "https://www.cve.org/CVERecord?id=CVE-2026-102937"
},
{
"type": "REPORT",
"url": "https://github.com/pypa/virtualenv/commit/d721ff140ce4afdc2a9b76751e4584e25d9fbea6"
},
{
"type": "REPORT",
"url": "https://github.com/pypa/virtualenv/pull/3250"
},
{
"type": "REPORT",
"url": "https://github.com/pypa/virtualenv/releases/tag/21.7.12"
},
{
"type": "REPORT",
"url": "https://github.com/pypa/virtualenv/security/advisories/GHSA-x78j-v8h9-3j2q"
}
],
"related": [],
"schema_version": "1.7.0",
"severity": [
{
"score": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N",
"type": "CVSS_V4"
},
{
"score": "medium",
"type": "Ubuntu"
}
],
"upstream": [
"CVE-2026-102937"
]
}
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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
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- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
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- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the
vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base
model, served locally by ML-Gateway.
They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.
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