BIT-virtualenv-2026-115586

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    BIT-virtualenv-2026-115586

    Published: 29 Oct 2026Last Modified: 29 Oct 2026

    Summary: virtualenv: Bash activator leaves the --prompt value unescaped in PS1 when promptvars is off, so prompt expansion later executes it (regression in 21.14.9)

    Details: virtualenv is a tool for creating isolated virtual python environments. From 21.14.9 until 21.14.13, the bash bin/activate script can copy an attacker-controlled --prompt value into PS1 without escaping dollar signs or backticks when both promptvars and POSIX mode are disabled during activation. Re-enabling promptvars, running set -o posix, or starting an interactive child bash that inherits the exported PS1 can then expand command substitution in the stored VIRTUAL_ENV_PROMPT value and execute commands as the user who activates the environment. This issue is fixed in version 21.14.13.

    References: https://github.com/pypa/virtualenv/commit/3598e201f6f044e389136b2347a8a919ac03c5f4, https://github.com/pypa/virtualenv/pull/3466, https://github.com/pypa/virtualenv/releases/tag/21.14.13, https://github.com/pypa/virtualenv/security/advisories/GHSA-cx6f-vjhg-g3cc, https://nvd.nist.gov/vuln/detail/CVE-2026-115586

    Affected packages

    Package

    Name: virtualenv

    Purl: pkg:bitnami/virtualenv

    Affected ranges

    Type: SEMVER

    Events:

    Introduced- 21.14.9
    Fixed -21.14.13

    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-2026-115586 | CVE-DB