High
python-virtualenv — security advisory
virtualenv is a tool for creating isolated virtual python environments. Prior to 21.7.12, download_wheel() accepts pip and setuptools seed wheels fetched for periodic updates or the --download option without checking their bytes against an authoritative digest equivalent to the embedded wheels' BUNDLE_SHA256 verification. A compromised index, stale mirror, or intercepted TLS connection can substitute a different wheel under the requested distribution, version, and filename, after which virtualenv caches and seeds the attacker-controlled wheel into subsequently created environments. The verification applies to the default PyPI path and is intentionally skipped when PIP_INDEX_URL, PIP_EXTRA_INDEX_URL, or PIP_INDEX configures a custom index that may legitimately publish rebuilt wheels. This issue is fixed in version 21.7.12.
- Products
- python-virtualenv
- Affected versions
- 1.10.1-1, 1.11-1, 1.11-2, 1.11.4-1, 1.11.4-1ubuntu1, 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, 15.1.0+ds-1, 15.1.0+ds-1.1, 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, 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, 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, 20.31.2+ds-1, 20.35.3+ds-1, 20.35.4+ds-1, 20.36.1+ds-1, 20.4.6+ds-2, 21.4.1+ds-1, 21.5.1+ds-1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-102930
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 01:57 UTC · Revision 1
Source evidence
virtualenv is a tool for creating isolated virtual python environments. Prior to 21.7.12, download_wheel() accepts pip and setuptools seed wheels fetched for periodic updates or the --download option without checking their bytes against an authoritative digest equivalent to the embedded wheels' BUNDLE_SHA256 verification. A compromised index, stale mirror, or intercepted TLS connection can substitute a different wheel under the requested distribution, version, and filename, after which virtualenv caches and seeds the attacker-controlled wheel into subsequently created environments. The verification applies to the default PyPI path and is intentionally skipped when PIP_INDEX_URL, PIP_EXTRA_INDEX_URL, or PIP_INDEX configures a custom index that may legitimately publish rebuilt wheels. This issue is fixed in version 21.7.12.
osv:UBUNTU-CVE-2026-102930
python-virtualenv
Fixed versions: Not specified
python-virtualenv
Fixed versions: Not specified
python-virtualenv
Fixed versions: Not specified
python-virtualenv
Fixed versions: Not specified
python-virtualenv
Fixed versions: Not specified
python-virtualenv
Fixed versions: Not specified
python-virtualenv
Fixed versions: Not specified
python-virtualenv
Fixed versions: Not specified
Complete source record
{
"id": "9e5a7b3b7ad6c3d05540eed34cc364065d38f26640119efacb39d15da4576fb2",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-102930",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-102930",
"summary": "virtualenv is a tool for creating isolated virtual python environments. Prior to 21.7.12, download_wheel() accepts pip and setuptools seed wheels fetched for periodic updates or the --download option without checking their bytes against an authoritative digest equivalent to the embedded wheels' BUNDLE_SHA256 verification. A compromised index, stale mirror, or intercepted TLS connection can substitute a different wheel under the requested distribution, version, and filename, after which virtualenv caches and seeds the attacker-controlled wheel into subsequently created environments. The verification applies to the default PyPI path and is intentionally skipped when PIP_INDEX_URL, PIP_EXTRA_INDEX_URL, or PIP_INDEX configures a custom index that may legitimately publish rebuilt wheels. This issue is fixed in version 21.7.12.",
"evidence": "osv:UBUNTU-CVE-2026-102930",
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{
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"aliases": [
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],
"modified": "2026-10-17T12:57:57.322267362Z",
"provider": "osv",
"upstream": [
"CVE-2026-102930"
],
"references": [
"https://ubuntu.com/security/CVE-2026-102930",
"https://www.cve.org/CVERecord?id=CVE-2026-102930",
"https://github.com/pypa/virtualenv/commit/a01ed3e2f239d6ab1fce62c5c7664ccf268fff6d",
"https://github.com/pypa/virtualenv/pull/3251",
"https://github.com/pypa/virtualenv/security/advisories/GHSA-94p9-xgh2-xp45"
]
},
"related_cves": [
{
"value": "CVE-2026-102930",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 357774,
"published_at": "2026-09-29T21:17:00+00:00"
}