There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - virtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.2, FishActivator
    inherits ViaTemplateActivator.quote(), which uses POSIX shlex.quote() even though fish interprets
    backslashes and single quotes differently. An attacker-influenced environment path, --prompt, or
    VIRTUALENV_PROMPT value containing a backslash before a quote can therefore terminate the generated fish
    literal and execute command substitution when the user sources activate.fish. This issue is fixed in
    version 21.14.2. (CVE-2026-113732)

Linux/Unix 主機上安裝了一個或多個受到弱點影響的套件，且供應商未提供可用的修補程式。

  - virtualenv 是一個用於建立隔離的虛擬 Python 環境的工具。在之前 21.14.2，FishActivator 繼承了 ViaTemplateActivator.quote（），它使用 POSIX shlex.quote（），即使 fish 以不同的方式解釋反斜線和單引號。因此，受攻擊者影響的環境路徑或 --prompt引號前包含反斜線的值VIRTUALENV_PROMPT可以終止產生的 fish 文字，並在使用者來源 activate.fish 時執行命令替換。21.14.2 版已修正此問題。(CVE-2026-113732)

請注意，Nessus 的判定取決於廠商所報告的套件是否存在。

Linux/Unix 主机中安装的一个或多个程序包受到一个漏洞影响，而供应商没有提供补丁程序。

  - virtualenv 是用于创建隔离的虚拟 Python 环境的工具。在之前 21.14.2，FishActivator 继承了 ViaTemplateActivator.quote（），即使 fish 以不同的方式解释反斜杠和单引号，它也会使用 POSIX shlex.quote（）。因此，受攻击者影响的环境路径VIRTUALENV_PROMPT或 --prompt引号前包含反斜线的值可终止生成的 fish 文本，并在用户提供 activate.fish 源时执行命令替换。此问题已在 21.14.2 版本中修复。(CVE-2026-113732)

请注意，Nessus 依赖供应商报告的程序包是否存在进行判断。

Linux/Unix ホストには、ベンダーが提供するパッチが利用できない脆弱性の影響を受ける複数のパッケージがインストールされています。

  - virtualenv は、独立した仮想 Python 環境を作成するためのツールです。21.14.2より前に、FishActivator は ViaTemplateActivator.quote() を継承します。これは、fish がバックスラッシュと一重引用符を異なって解釈する場合でも、POSIX shlex.quote() を使用します。このため、攻撃者の影響を受ける環境パス、 --prompt、または引用符の前にバックスラッシュが含まれているVIRTUALENV_PROMPT値によって、生成された fish リテラルが終了し、ユーザーが activate.fish をソースするときにコマンド置換を実行する可能性があります。この問題はバージョン 21.14.2 で修正されています。(CVE-2026-113732)

Nessus は、ベンダーによって報告されたパッケージの存在に依存していることに注意してください。

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - virtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.2, FishActivator     inherits ViaTemplateActivator.quote(), which uses POSIX shlex.quote() even though fish interprets     backslashes and single quotes differently. An attacker-influenced environment path, --prompt, or     VIRTUALENV_PROMPT value containing a backslash before a quote can therefore terminate the generated fish     literal and execute command substitution when the user sources activate.fish. This issue is fixed in     version 21.14.2. (CVE-2026-113732)

Note that Nessus relies on the presence of the package as reported by the vendor.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-3409 advisory.

    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. (CVE-2026-113715)

    virtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.9, virtualenv's     ScriptMakerCustom and pip pass an incompletely quoted interpreter path to distlib ScriptMaker when     generating POSIX console scripts. When the path contains a space or produces a shebang longer than 127     bytes, distlib emits a /bin/sh wrapper whose double-quoted interpreter path still expands command     substitutions and backticks. An attacker who influences the environment destination can therefore execute     commands with the user's privileges when the user later runs a generated launcher; environment creation     and activation do not trigger the command. Existing launchers are not repaired by upgrading virtualenv     alone and must be regenerated, while a later independent pip installation or upgrade can reintroduce an     affected launcher because pip's vendored distlib is unchanged. The virtualenv fix is released in version     21.14.9. (CVE-2026-113722)

    virtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.9, caller-supplied     prompt text can become executable syntax in the bash activation prompt. An attacker must influence the     value passed to virtualenv, and a user must subsequently activate the environment and draw the prompt.
    This vulnerability is fixed in 21.14.9. (CVE-2026-113723)

    virtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.7, the bash     activate script escapes the environment name for only one of the two passes bash makes over PS1, so a     backslash in the name undoes the escaping and a name containing \$(...) runs as commands in the user's     shell each time bash draws the prompt. This issue is fixed in version 21.14.7. (CVE-2026-113725)

    virtualenv is a tool for creating isolated virtual python environments. Prior to 21.13.0, the bash     activate script that zsh also sources leaves the environment name unescaped; from 21.13.0 until 21.14.4,     it escapes backslashes, dollar signs, and backticks only when BASH_VERSION is set, so zsh receives the raw     value. The script assigns that value to PS1. In zsh with PROMPT_SUBST, an attacker-influenced environment     directory, --prompt, or VIRTUALENV_PROMPT value containing command, parameter, or arithmetic expansion     syntax can therefore execute commands in the user's shell each time the prompt is drawn. A percent sign is     separately interpreted as a zsh prompt escape but does not by itself execute commands. Plain zsh with     PROMPT_SUBST disabled and bash are not affected by this mechanism. This issue is fixed in version 21.14.4.
    (CVE-2026-113726)

    virtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.2, FishActivator     inherits ViaTemplateActivator.quote(), which uses POSIX shlex.quote() even though fish interprets     backslashes and single quotes differently. An attacker-influenced environment path, --prompt, or     VIRTUALENV_PROMPT value containing a backslash before a quote can therefore terminate the generated fish     literal and execute command substitution when the user sources activate.fish. This issue is fixed in     version 21.14.2. (CVE-2026-113732)

    virtualenv is a tool for creating isolated virtual python environments. From 20.26.6 until 21.14.2,     ViaTemplateActivator.instantiate_template() replaces placeholders one key at a time across the complete     activation template, so trigger names such as __VIRTUAL_NAME__, __VIRTUAL_ENV__, or __VIRTUAL_PROMPT__     inside an already substituted and quoted environment path or prompt can be replaced during a later pass.
    The later value's quoting can close the earlier literal and execute the remaining path when a user     activates the environment through bash, fish, xonsh, or activate_this.py. The distinct csh prompt-display     token __VIRTUAL_PROMPT_DISPLAY_TCSH__ can instead break the generated script without establishing command     execution. The attacker must influence the destination path or --prompt, and a value without a relevant     placeholder name does not trigger this mechanism. This issue is fixed in version 21.14.2.
    (CVE-2026-113776)

    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. (CVE-2026-115586)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-3410 advisory.

    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. (CVE-2026-113715)

    virtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.9, virtualenv's     ScriptMakerCustom and pip pass an incompletely quoted interpreter path to distlib ScriptMaker when     generating POSIX console scripts. When the path contains a space or produces a shebang longer than 127     bytes, distlib emits a /bin/sh wrapper whose double-quoted interpreter path still expands command     substitutions and backticks. An attacker who influences the environment destination can therefore execute     commands with the user's privileges when the user later runs a generated launcher; environment creation     and activation do not trigger the command. Existing launchers are not repaired by upgrading virtualenv     alone and must be regenerated, while a later independent pip installation or upgrade can reintroduce an     affected launcher because pip's vendored distlib is unchanged. The virtualenv fix is released in version     21.14.9. (CVE-2026-113722)

    virtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.9, caller-supplied     prompt text can become executable syntax in the bash activation prompt. An attacker must influence the     value passed to virtualenv, and a user must subsequently activate the environment and draw the prompt.
    This vulnerability is fixed in 21.14.9. (CVE-2026-113723)

    virtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.7, the bash     activate script escapes the environment name for only one of the two passes bash makes over PS1, so a     backslash in the name undoes the escaping and a name containing \$(...) runs as commands in the user's     shell each time bash draws the prompt. This issue is fixed in version 21.14.7. (CVE-2026-113725)

    virtualenv is a tool for creating isolated virtual python environments. Prior to 21.13.0, the bash     activate script that zsh also sources leaves the environment name unescaped; from 21.13.0 until 21.14.4,     it escapes backslashes, dollar signs, and backticks only when BASH_VERSION is set, so zsh receives the raw     value. The script assigns that value to PS1. In zsh with PROMPT_SUBST, an attacker-influenced environment     directory, --prompt, or VIRTUALENV_PROMPT value containing command, parameter, or arithmetic expansion     syntax can therefore execute commands in the user's shell each time the prompt is drawn. A percent sign is     separately interpreted as a zsh prompt escape but does not by itself execute commands. Plain zsh with     PROMPT_SUBST disabled and bash are not affected by this mechanism. This issue is fixed in version 21.14.4.
    (CVE-2026-113726)

    virtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.2, FishActivator     inherits ViaTemplateActivator.quote(), which uses POSIX shlex.quote() even though fish interprets     backslashes and single quotes differently. An attacker-influenced environment path, --prompt, or     VIRTUALENV_PROMPT value containing a backslash before a quote can therefore terminate the generated fish     literal and execute command substitution when the user sources activate.fish. This issue is fixed in     version 21.14.2. (CVE-2026-113732)

    virtualenv is a tool for creating isolated virtual python environments. From 20.26.6 until 21.14.2,     ViaTemplateActivator.instantiate_template() replaces placeholders one key at a time across the complete     activation template, so trigger names such as __VIRTUAL_NAME__, __VIRTUAL_ENV__, or __VIRTUAL_PROMPT__     inside an already substituted and quoted environment path or prompt can be replaced during a later pass.
    The later value's quoting can close the earlier literal and execute the remaining path when a user     activates the environment through bash, fish, xonsh, or activate_this.py. The distinct csh prompt-display     token __VIRTUAL_PROMPT_DISPLAY_TCSH__ can instead break the generated script without establishing command     execution. The attacker must influence the destination path or --prompt, and a value without a relevant     placeholder name does not trigger this mechanism. This issue is fixed in version 21.14.2.
    (CVE-2026-113776)

    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. (CVE-2026-115586)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The CentOS Linux 7 host has a package installed that is affected by multiple vulnerabilities as referenced in the TuxCare CENTOS7:CLSA-2026:1793888087 advisory.

  - virtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.9, caller-supplied     prompt text can become executable syntax in the bash activation prompt. An attacker must influence the     value passed to virtualenv, and a user must subsequently activate the environment and draw the prompt.
    This vulnerability is fixed in 21.14.9. (CVE-2026-113723)

  - virtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.7, the bash     activate script escapes the environment name for only one of the two passes bash makes over PS1, so a     backslash in the name undoes the escaping and a name containing \$(...) runs as commands in the user's     shell each time bash draws the prompt. This issue is fixed in version 21.14.7. (CVE-2026-113725)

  - virtualenv is a tool for creating isolated virtual python environments. Prior to 21.13.0, the bash     activate script that zsh also sources leaves the environment name unescaped; from 21.13.0 until 21.14.4,     it escapes backslashes, dollar signs, and backticks only when BASH_VERSION is set, so zsh receives the raw     value. The script assigns that value to PS1. In zsh with PROMPT_SUBST, an attacker-influenced environment     directory, --prompt, or VIRTUALENV_PROMPT value containing command, parameter, or arithmetic expansion     syntax can therefore execute commands in the user's shell each time the prompt is drawn. A percent sign is     separately interpreted as a zsh prompt escape but does not by itself execute commands. Plain zsh with     PROMPT_SUBST disabled and bash are not affected by this mechanism. This issue is fixed in version 21.14.4.
    (CVE-2026-113726)

  - virtualenv is a tool for creating isolated virtual python environments. Prior to 21.14.2, FishActivator     inherits ViaTemplateActivator.quote(), which uses POSIX shlex.quote() even though fish interprets     backslashes and single quotes differently. An attacker-influenced environment path, --prompt, or     VIRTUALENV_PROMPT value containing a backslash before a quote can therefore terminate the generated fish     literal and execute command substitution when the user sources activate.fish. This issue is fixed in     version 21.14.2. (CVE-2026-113732)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Published	Updated	Severity
476570	SCA: security update for virtualenv (GHSA-c947-3pg5-gm8q)	Tenable Self-Hosted Container Security	SCA Checks	10/21/2026	10/21/2026	high
476643	Chainguard: openstack-rally-2025.2: security update to 4.1.0-r4	Tenable Self-Hosted Container Security	Chainguard Local Security Checks	10/22/2026	10/22/2026	high
476570	SCA: security update for virtualenv (GHSA-c947-3pg5-gm8q)	Tenable Cloud Security	SCA Checks	10/21/2026	10/21/2026	high
476643	Chainguard: openstack-rally-2025.2: security update to 4.1.0-r4	Tenable Cloud Security	Chainguard Local Security Checks	10/22/2026	10/22/2026	high
370939	Linux Distros 未修補弱點：CVE-2026-113732	Nessus	Misc.	10/23/2026	10/30/2026	high
370939	Linux Distros 未修补的漏洞：CVE-2026-113732	Nessus	Misc.	10/23/2026	10/30/2026	high
370939	Linux Distros のパッチ未適用の脆弱性: CVE-2026-113732	Nessus	Misc.	10/23/2026	10/30/2026	high
370939	Linux Distros Unpatched Vulnerability : CVE-2026-113732	Nessus	Misc.	10/23/2026	10/30/2026	high
377956	Amazon Linux 2023 : python3-virtualenv (ALAS2023-2026-3409)	Nessus	Amazon Linux Local Security Checks	11/9/2026	11/9/2026	high
377898	Amazon Linux 2023 : python3.13-virtualenv (ALAS2023-2026-3410)	Nessus	Amazon Linux Local Security Checks	11/9/2026	11/9/2026	high
377996	CentOS Linux 7 [TuxCare] Security Update: python-virtualenv Multiple Vulnerabilities (CENTOS7:CLSA-2026:1793888087)	Nessus	CentOS Local Security Checks	11/9/2026	11/9/2026	high

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