BIT-virtualenv-2026-113721

    Dashboard / Vulnerabilities / BIT-virtualenv-2026-113721

    BIT-virtualenv-2026-113721

    Published: 29 Oct 2026Last Modified: 29 Oct 2026

    Summary: virtualenv: Generated files can follow existing destination links

    Details: virtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.9, ViaTemplateActivator._generate() removes an existing output only when Path.exists() is true, allowing a dangling symlink to survive and redirect generated activation content, while PyEnvCfg.write() opens pyvenv.cfg without first replacing an existing symbolic or hard link. Another local account that prepares final entries inside the destination can therefore cause environment creation to create or overwrite files outside the requested tree with constrained virtualenv-generated content and the invoking user's permissions. The destination parent must remain controlled by the environment owner during creation; concurrent parent-directory replacement is a separate concern. This issue is fixed in version 21.14.9.

    References: https://github.com/pypa/virtualenv/commit/d25f28699eefb1fc34a251e5adf2b5de844c36cd, https://github.com/pypa/virtualenv/pull/3431, https://github.com/pypa/virtualenv/releases/tag/21.14.9, https://github.com/pypa/virtualenv/security/advisories/GHSA-558c-9hv2-4prj, https://nvd.nist.gov/vuln/detail/CVE-2026-113721

    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
    BIT-virtualenv-2026-113721 | CVE-DB