{"id":"CVE-2026-102938","title":"virtualenv is a tool for creating isolated virtual python environments","summary":"virtualenv is a tool for creating isolated virtual python environments. Prior to 21.7.11, PyEnvCfg.write() writes prompt values verbatim to the line-oriented pyvenv.cfg format while PyEnvCfg._read_values() parses the file with str.splitl…","severity":"medium","cvss":5.8,"cvssVector":"CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:P/VC:L/VI:H/VA:L/SC:N/SI:N/SA:N","cwe":["CWE-93"],"vendor":"pypa","product":"virtualenv","affected":["virtualenv < 21.7.11"],"published":"2026-09-29","updated":"2026-09-29","sourceUpdated":"2026-09-29T21:17:19.047","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-102938","references":[{"url":"https://github.com/pypa/virtualenv/commit/a30f995461043acb6cacbf3a890951563ccf7140","label":"security-advisories@github.com"},{"url":"https://github.com/pypa/virtualenv/pull/3247","label":"security-advisories@github.com"},{"url":"https://github.com/pypa/virtualenv/releases/tag/21.7.11","label":"security-advisories@github.com"},{"url":"https://github.com/pypa/virtualenv/security/advisories/GHSA-9h9j-4vrj-gf7g","label":"security-advisories@github.com"}],"tags":["nvd","cve.org"],"cvssSource":"cna","ingestedAt":"2026-09-29T21:49:08.217Z","slug":"CVE-2026-102938","body":"## Overview\n\nvirtualenv is a tool for creating isolated virtual python environments. Prior to 21.7.11, PyEnvCfg.write() writes prompt values verbatim to the line-oriented pyvenv.cfg format while PyEnvCfg._read_values() parses the file with str.splitlines() and accepts the last value for duplicate keys. An attacker who influences --prompt, VIRTUALENV_PROMPT, or configuration input can insert a recognized line boundary and additional keys, including home, causing consumers to use an attacker-selected base interpreter or corrupted environment metadata. The security impact requires prompt input from outside the operator's trust boundary; directly supplied prompt content primarily corrupts the operator's own environment. This issue is fixed in version 21.7.11.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":32,"depthScoreParts":{"impact":31.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}