pypa virtualenv up to 21.7.11 Wheel Download download_wheel authorization

Summaryinfo

A vulnerability labeled as problematic has been found in pypa virtualenv up to 21.7.11. The impacted element is the function download_wheel of the component Wheel Download. The manipulation results in authorization. This vulnerability is reported as CVE-2026-102930. The attack can be launched remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in pypa virtualenv up to 21.7.11. It has been classified as problematic. Affected is the function download_wheel of the component Wheel Download. The manipulation with an unknown input leads to a authorization vulnerability. CWE is classifying the issue as CWE-862. The product does not perform an authorization check when an actor attempts to access a resource or perform an action. This is going to have an impact on integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-102930 since 09/29/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available.

Upgrading to version 21.7.12 eliminates this vulnerability.

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Productinfo

Vendor

• pypa

Name

• virtualenv

Version

• 21.7.0
• 21.7.1
• 21.7.2
• 21.7.3
• 21.7.4
• 21.7.5
• 21.7.6
• 21.7.7
• 21.7.8
• 21.7.9
• 21.7.10
• 21.7.11

Website

• Product: https://github.com/pypa/virtualenv/

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