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virtualenv: Command injection via --prompt in activate.bat (batch activator)

Type: advisorySource: Official CVE List1 source record

virtualenv is a tool for creating isolated virtual python environments. Prior to 21.7.12, BatchActivator.quote() returns prompt text unchanged before activate.bat inserts it into a cmd.exe set "VAR=value" statement. An attacker who influences --prompt, VIRTUALENV_PROMPT, or the corresponding configuration value can include a double quote that closes the assignment and leaves following cmd.exe operators as executable syntax. When a user activates the generated Windows environment, the injected commands run with that user's privileges. This issue is fixed in version 21.7.12.

Announced Source revision 1
Original source ↗

CVE-2026-102937

Primary source · Revision 1

Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.

Security context

Source reference: cve:CVE-2026-102937

virtualenv

Source reference: /containers/cna/affected/0/product

Affected versions
Not stated in this record
Fixed versions
Not stated in this record
Prerequisites
Not stated in this record

Structured affected-version data

Original package identities and version rules from this source.

[
  {
    "vendor": "pypa",
    "product": "virtualenv",
    "versions": [
      {
        "status": "affected",
        "version": "< 21.7.12"
      }
    ]
  }
]
Related CVEs
CVE-2026-102937

Source reference: /cveMetadata/cveId

Publisher severity

high

Source reference: /containers/cna/metrics

Event
#7902 · Revision 1
Added to Heist Feed
Publisher date
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