Is there a public exploit for CVE-2026-113726?

No public exploit for CVE-2026-113726 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-113726?

CVE-2026-113726 scores CVSS 7.8 (v3.1), rated high. EPSS puts the chance of exploitation in the next 30 days at 0.35%.

What does CVE-2026-113726 affect?

CVE-2026-113726 affects pypa virtualenv.

7.8 High

virtualenv is a tool for creating isolated virtual python environments.

CVE-2026-113726

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 BASHVERSION is set, so zsh receives the raw value. The script assigns that value to PS1. In zsh with PROMPTSUBST, an attacker-influenced environment directory, --prompt, or VIRTUALENVPROMPT 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 PROMPTSUBST disabled and bash are not affected by this mechanism. This issue is fixed in version 21.14.4.

Assessment

CVSS: 7.8 (v3.1)
Severity: High
EPSS: 0.35% chance of exploitation in the next 30 days
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 20 October 2026
Last updated: 27 October 2026
Affected: pypa · virtualenv
Weakness: CWE-116, CWE-78
Assigner: security-advisories@github.com

CVSS vectorCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

At the source

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