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  4. CVE 2026 113725 virtualenv bash activate runs commands from an
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Back to active CVEs
High · CVSS 7.8CVE-2026-113725

virtualenv bash activate runs commands from an environment name with a backslash before $CVE-2026-113725

Answer in brief

CVE-2026-113725 records a High severity (CVSS 7.8) vulnerability in virtualenv bash activate runs commands from an environment name with a backslash before $. The current sources do not mark it as known exploited. The current feed maps pypa/virtualenv (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 20, 2026Updated Oct 20, 2026Source checked Oct 20, 2026First seen by HOL Oct 20, 2026Material review Oct 20, 2026
Upstream Advisory

Key facts

Risk
High · CVSS 7.8
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 7.8. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps pypa/virtualenv (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
pypa/virtualenvgeneric<21.14.721.14.7

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for pypa/virtualenv.
  2. 2Review the reported fix. Update pypa/virtualenv to 21.14.7 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 20, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 20, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 20, 2026

Sources and claim methodology

  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
  • GitHub security advisorygithub.com
Upstream source description

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.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • virtualenv activate runs commands from the environment name in zsh with PROMPT_SUBSTSame pypa/virtualenv package
  • virtualenv activate.fish runs commands from a path or prompt with a backslash before a quoteSame pypa/virtualenv package
  • virtualenv activation scripts run code from a path that contains a placeholder nameSame pypa/virtualenv package

Record context

Vulnerability class
Command Injection
EPSS
Not reported
CWE IDs
CWE-78, CWE-116
Source
CVE List V5
Source checked
Oct 20, 2026
References
3 linked sources
Open source record