CVE-2026-113726 affecting package python-pip 24.2-10
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.
- Products
- python-pip
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-113726
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 1 Nov 2026, 17:30 UTC · Revision 1
Source evidence
CVE-2026-113726 affecting package python-pip 24.2-10
core-osv · Original sourcePublished 20 Oct 2026, 22:19 UTC
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.
osv:AZL-110076
python-pip
Fixed versions: Not specified
Complete source record
{
"id": "02bf4b4422085a1ec6754bf78d734afe81b49662f251ada295f0155be8057c2f",
"url": "https://osv.dev/vulnerability/AZL-110076",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "CVE-2026-113726 affecting package python-pip 24.2-10",
"summary": "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.",
"evidence": "osv:AZL-110076",
"products": [
{
"name": {
"value": "python-pip",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
"fixed_versions": [],
"affected_versions": []
}
],
"severity": "unknown",
"structured": {
"id": "AZL-110076",
"aliases": [
"AZL-110076"
],
"affected": [
{
"ranges": [
{
"type": "ECOSYSTEM",
"events": [
{
"introduced": "0"
},
{
"last_affected": "24.2-10"
}
]
}
],
"package": {
"name": "python-pip",
"purl": "pkg:rpm/azure-linux/python-pip",
"ecosystem": "Azure Linux:3"
},
"database_specific": {
"source": "https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-110076.json"
}
}
],
"modified": "2026-10-27T05:36:16Z",
"provider": "osv",
"upstream": [
"CVE-2026-113726"
],
"references": [
"https://nvd.nist.gov/vuln/detail/CVE-2026-113726"
]
},
"related_cves": [
{
"value": "CVE-2026-113726",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": null
},
"source_id": "core-osv",
"document_id": 460570,
"published_at": "2026-10-20T22:19:29+00:00"
}