BIT-virtualenv-2026-113715

    Dashboard / Vulnerabilities / BIT-virtualenv-2026-113715

    BIT-virtualenv-2026-113715

    Published: 29 Oct 2026Last Modified: 29 Oct 2026

    Summary: virtualenv: Venv configuration readback can reinterpret path boundaries

    Details: virtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.9, the stdlib venv creator reads generated pyvenv.cfg with str.splitlines() and merges parsed keys over virtualenv's selected configuration. An untrusted caller who influences the destination pathname can include a line-boundary character such as U+2028 to inject keys including home and include-system-site-packages, causing path data to change configuration structure before final output. Setting include-system-site-packages to true weakens environment isolation, while an altered home can change which standard-library files the interpreter loads if the attacker also controls that location. The builtin creator does not use this readback path. This issue is fixed in version 21.14.9.

    References: https://github.com/pypa/virtualenv/commit/b0008a58885ded9227faf8f910c6c402712c750a, https://github.com/pypa/virtualenv/pull/3426, https://github.com/pypa/virtualenv/releases/tag/21.14.9, https://github.com/pypa/virtualenv/security/advisories/GHSA-qmx5-4p3x-wvqf, https://nvd.nist.gov/vuln/detail/CVE-2026-113715

    Affected packages

    Package

    Name: virtualenv

    Purl: pkg:bitnami/virtualenv

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 0
    Fixed -21.14.9

    Affected versions

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High