OS Command Injection in py3-virtualenv - #VU151615
Published: September 22, 2026
Vulnerability identifier: #VU151615
CSH Severity: High
CVSS v4: 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]
CVE-ID: N/A
CWE-ID: CWE-78
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
py3-virtualenv
Remediation
Install security update from vendor's website.
py3-virtualenv - update to 21.7.12