{"id":"CVE-2026-102930","title":"virtualenv is a tool for creating isolated virtual python environments","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 …","severity":"high","cvss":7.7,"cvssVector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","cwe":["CWE-494"],"vendor":"pypa","product":"virtualenv","affected":["virtualenv < 21.7.12"],"published":"2026-09-29","updated":"2026-09-29","sourceUpdated":"2026-09-29T21:17:18.740","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-102930","references":[{"url":"https://github.com/pypa/virtualenv/commit/a01ed3e2f239d6ab1fce62c5c7664ccf268fff6d","label":"security-advisories@github.com"},{"url":"https://github.com/pypa/virtualenv/pull/3251","label":"security-advisories@github.com"},{"url":"https://github.com/pypa/virtualenv/security/advisories/GHSA-94p9-xgh2-xp45","label":"security-advisories@github.com"}],"tags":["nvd","cve.org"],"cvssSource":"cna","ingestedAt":"2026-09-29T21:49:08.216Z","slug":"CVE-2026-102930","body":"## Overview\n\nvirtualenv 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":42,"depthScoreParts":{"impact":42.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}