SB2026092255 - Multiple vulnerabilities in py3-virtualenv

Description

This security bulletin contains information about 2 vulnerabilities.

1) Download of code without integrity check (CVE-ID: N/A)

CWE-ID: CWE-494 - Download of Code Without Integrity Check

CVSSv4: 9.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to execute arbitrary code.

The vulnerability exists due to download of code without integrity check in the download_wheel() function when downloading pip or setuptools seed wheels. A remote attacker can substitute a wheel served under the same distribution, version, and filename to execute arbitrary code.

The issue affects wheels retrieved through the periodic-update feature or the --download flag.

2) OS Command Injection (CVE-ID: N/A)

CWE-ID: CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

CVSSv4: 8.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

The vulnerability allows a remote attacker to execute arbitrary commands.

The vulnerability exists due to improper neutralization of special elements in BatchActivator.quote() when handling an attacker-controlled virtual environment prompt. A remote attacker can supply a crafted prompt value to execute arbitrary commands.

User interaction is required to activate the virtual environment on Windows.

Remediation

Install update from vendor's website.

References

• https://github.com/pypa/virtualenv/security/advisories/GHSA-94p9-xgh2-xp45
• https://github.com/pypa/virtualenv/security/advisories/GHSA-x78j-v8h9-3j2q
• https://github.com/pypa/virtualenv/pull/3250