pypa virtualenv up to 21.14.8 Digest Verification PipInvoke.get_pip_install_cmd comparison

Summaryinfo

A vulnerability was found in pypa virtualenv up to 21.14.8 and classified as critical. Affected by this vulnerability is the function PipInvoke.get_pip_install_cmd of the component Digest Verification. Such manipulation leads to comparison. This vulnerability is uniquely identified as CVE-2026-113717. The attack can be launched remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in pypa virtualenv up to 21.14.8. It has been rated as critical. Affected by this issue is the function PipInvoke.get_pip_install_cmd of the component Digest Verification. The manipulation with an unknown input leads to a comparison vulnerability. Using CWE to declare the problem leads to CWE-697. The product compares two entities in a security-relevant context, but the comparison is incorrect, which may lead to resultant weaknesses. Impacted is confidentiality, integrity, and availability. CVE summarizes:

virtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.9, PipInvoke.get_pip_install_cmd() handles --seeder pip --download by calling get_wheel(download=False) and then allowing pip to consult the configured index, bypassing virtualenv's download_wheel() and verify_wheel_digest() path. When virtualenv's default-index PyPI digest comparison remains enabled, an index candidate matching the bundled package and version can therefore be selected without comparison to PyPI SHA-256 metadata. Explicit custom-index settings already opt out of that comparison and remain outside this verification-bypass claim; the demonstrated configuration used a non-PyPI index while leaving the index environment variables unset so the comparison policy remained active. This condition does not independently defeat TLS or establish control of the index response. This issue is fixed in version 21.14.9.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-113717 since 10/20/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. Successful exploitation requires user interaction by the victim. There are known technical details, but no exploit is available.

Upgrading to version 21.14.9 eliminates this vulnerability.

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Productinfo

Vendor

• pypa

Name

• virtualenv

Version

• 21.14.0
• 21.14.1
• 21.14.2
• 21.14.3
• 21.14.4
• 21.14.5
• 21.14.6
• 21.14.7
• 21.14.8

Website

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

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