{"id":"CVE-2026-102937","title":"virtualenv is a tool for creating isolated virtual python environments","summary":"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 influ…","severity":"high","cvss":7.3,"cvssVector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N","cwe":["CWE-78"],"vendor":"pypa","product":"virtualenv","affected":["virtualenv < 21.7.12"],"published":"2026-09-29","updated":"2026-09-29","sourceUpdated":"2026-09-29T21:17:18.893","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-102937","references":[{"url":"https://github.com/pypa/virtualenv/commit/d721ff140ce4afdc2a9b76751e4584e25d9fbea6","label":"security-advisories@github.com"},{"url":"https://github.com/pypa/virtualenv/pull/3250","label":"security-advisories@github.com"},{"url":"https://github.com/pypa/virtualenv/releases/tag/21.7.12","label":"security-advisories@github.com"},{"url":"https://github.com/pypa/virtualenv/security/advisories/GHSA-x78j-v8h9-3j2q","label":"security-advisories@github.com"}],"tags":["nvd","cve.org"],"cvssSource":"cna","ingestedAt":"2026-09-29T21:49:08.216Z","slug":"CVE-2026-102937","body":"## Overview\n\nvirtualenv 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":40,"depthScoreParts":{"impact":40.2,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}