CVE-2026-102930High· 7.7▾ Twilightvirtualenv 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 …
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 42.4 · likelihood 0 · exploitation 0
Need a working PoC? Pro members can cast a request and our team develops one — it lands right here.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the assigning CNA record, not NVD.
Exploit-prediction probability, daily snapshots since Sep 30.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.2%
0.2% → 0.2%
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.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
virtualenv <= 21.7.11Patched in:
virtualenv 21.7.12Connected by shared product, vendor, weakness, or advisory.
CVE-2026-102938Medium· 5.8virtualenv is a tool for creating isolated virtual python environments
CVE-2026-102937High· 7.3virtualenv is a tool for creating isolated virtual python environments
CVE-2026-102925High· 7.8virtualenv is a tool for creating isolated virtual python environments
CVE-2026-113732High· 7.8virtualenv activate.fish runs commands from a path or prompt with a backslash before a quote
CVE-2026-113776High· 7.8virtualenv activation scripts run code from a path that contains a placeholder name
CVE-2026-113726High· 7.8virtualenv activate runs commands from the environment name in zsh with PROMPT_SUBST