{"id":"BIT-virtualenv-2026-102930","summary":"virtualenv: Downloaded seed wheels (pip/setuptools) are not integrity-checked before use","details":"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.","aliases":["CVE-2026-102930","GHSA-94p9-xgh2-xp45","PYSEC-2026-4011"],"modified":"2026-10-06T15:26:06.490658879Z","published":"2026-10-06T11:57:37.353Z","database_specific":{"severity":"High","cpes":["cpe:2.3:a:virtualenv:virtualenv:*:*:*:*:*:python:*:*"]},"references":[{"type":"WEB","url":"https://github.com/pypa/virtualenv/commit/a01ed3e2f239d6ab1fce62c5c7664ccf268fff6d"},{"type":"WEB","url":"https://github.com/pypa/virtualenv/pull/3251"},{"type":"WEB","url":"https://github.com/pypa/virtualenv/security/advisories/GHSA-94p9-xgh2-xp45"},{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-102930"}],"affected":[{"package":{"name":"virtualenv","ecosystem":"Bitnami","purl":"pkg:bitnami/virtualenv"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"21.7.12"}]}],"database_specific":{"source":"https://github.com/bitnami/vulndb/tree/main/data/virtualenv/BIT-virtualenv-2026-102930.json"},"severity":[{"type":"CVSS_V4","score":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}],"schema_version":"1.9.0"}