Resources Downloaded over Insecure Protocol Affecting virtualenv package, versions [,21.7.12)
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-PYTHON-VIRTUALENV-20335492
- published30 Sept 2026
- disclosed29 Sept 2026
- creditBernát Gábor
Introduced: 29 Sep 2026
NewCVE-2026-102930 (opens in a new tab)How to fix?
Upgrade virtualenv to version 21.7.12 or higher.
Overview
Affected versions of this package are vulnerable to Resources Downloaded over Insecure Protocol via the download_wheel function in src/virtualenv/seed/wheels/acquire.py, which invokes pip download to fetch seed wheels without subsequently verifying the downloaded wheel's SHA-256 digest against the PyPI JSON API. An attacker positioned between the client and the package index can serve a tampered wheel that pip accepts, and because no digest check is performed, the malicious wheel is silently used to seed new virtual environments, leading to full compromise of the seeded environment's integrity and confidentiality.
Note: This is only exploitable when the default PyPI index is in use and an attacker can intercept or manipulate the download (e.g. via a MitM or a compromised mirror).